350 Chevy TBI to 4 Barrel Carb
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- เผยแพร่เมื่อ 15 ก.ย. 2024
- 350 Chevy TBI to 4 Barrel Carb
This is the removal of the old fuel injection system (TBI) and new install of a 4 barrel carburetor. My Blazer is 1986 but had an engine from an 88 or newer. I could not pass smog with the new system, so this is my attempt at changing back to carburation.
Using :
Edelbrock 1406 carb, 600CFM 4 bbl
Edelbrock 3706 Aluminum intake manifold w/ egr
I have an '88 IROC Z28 Camaro sitting in the garage for 10 years with a bad fuel pump, stolen catalytic converters and a stripped thermostat housing. This video assures me firing it back to life in 2024. Thanks 👍
I would like to see that !!!
Those old tbi heads, when going to a carb make sure you have the old style intake gaskets. The tbi gaskets had solid water passageways (on the rear of motor) with a small drill opening. The tbi intakes, pooled up gasoline on back runners. Chevy's fix was to heat up the back of the motor to flash liquid gas. Your carb motor will overheat if you use tbi gaskets. Edelbrock performer 2104, spread bore has the center holes drilled at the angle needed. The tbi's made torque to 4500 rpm then fell on their faces. Best thing to do is move from California and throw the tbi heads at the state line. Put on vortec, or dart or something and don't look back unless it's the cars your passing!
I own a 88 Scottsdale with a 350/ TBI. This has to be the best how to video for me! You are saving me a lot of grief and head aches. the running of the blazer after each install very professional. keep up the awesome videos. I will be checking out your other videos for sure. my chevy suppose to be my backup cannot keep it running for more than 2 minutes.My 90 ranger /XLT has been my loyal go to for 10 years now. Yelm, WA
I think you will get the old Scottsdale running ! The TBI is testy but it can be tuned and runs clean too. Keep working, let me know how it goes. This week, I will be installing a new throttle cable in the Blazer. The current one is falling off and held on by some baling wire....
The old 350 engine actually sounds 100% happier now !
Nice job...I doing pretty much the same thing now myself !
I’m doing the same thing on my ‘89 Ford F-250. Thankfully the intake manifolds are direct swaps. I’m making my fuel system a return system rather than a dead head system to keep vapor lock problems at a minimum.
So far the best takeaway it that it has really cleaned up the engine bay. I’m in the middle of the process just now so I don’t know how the performance will be changed but the FI was just all cobbled together by the previous owner and ran really crappy. Hoping for a significant boost in power.
That was the story with mine. Subpar mechanics installing old parts. I was so happy to get rid of all the tangled wires and mess. I feel it is a lot cleaner like you said. !!
I've bought a 90s blazer, it was fuel injected but the owner before the guy I bought it from had swapped a carb on it
yup. had the intake and matching 670 holley tbi. dumped them for a carb. ran sooo much better
i am thinking of switching my edelbrock carb for a holley. not quite sure yet though.
@@wolfwalker23 easyer to tune. the holleys always felt more snappy for me than the eldebrock. but can be more prone to leaks
Thats awsome! Great video. I bought a 95 Chevy 2500 cheynne from work, and it been sitting for 6+ years
I put a new fuel filter on,oil change siphoned the gas put in seafoam, finally got it running for a few minutes before it died. After watching your video I definitely want to go 4 barrel. Could you explain a little more about the bracket you had to make.
Thank you
There is an edelbrock bracket that I bought. some kind of kit. I then put some plumbers tape which just extended the bracket a little to fit on the carb. It works great and is adjustable.
That's not plumbers tape. Plumbers tape is Teflon tape used for sealing pipe threads. You're using straps that plumbers use to hang pipes in a ceiling. Maybe it's called pipe hanging tape. Definitely not plumbers tape though lol. Just trying to make it easier when you ask the clerk in the plumbing aisle at the store.
Hey great job on the swap. I'm close to being finished with the build on my 92 chevy truck . I need to know what wires to keep and which ones to get rid of, thanks in advance.
when you convert to carb they say you need the converter lock up it takes stress off the fluid coupling of the torque converter and it help decrease the amount of heat being generated at highter cruising speeds when you elimate the computer they say you need that on the 700r4 trans and the 200-r4 trans.............
Was there noticeable power increase when switching from tbi to carb ?
Not much
Your allowed to upgrade to a newer engine but it still has to put out the same smog emissions allowed for the newer engine and have it bared here in California
If the TBI and engine were modified and set up the right way with super ported and port matched 193 swirl port heads, 4-pattern single pattern duration David Vizard (look him up) spec'd camshaft, 1.6 stainless roller rockers, 670cfm TBI throttle body with flowmatched injectors, injector pod spacer, TB spacer and sp-2p intake manifold... you'd have a torque monster of a TBI 350.
Nice motor and great video
That's a beautiful ride bro
Great video and very helpful! Thanks a lot!!
Damn. I got lucky. My truck is 1969 so its smog exempt. Im converting mine to tbi, installing a roller cam with roller rockers, 2.02 camelhump heads, a victor junior high rise intake, and stainless steel ceramic coated headers that go into an h pipe dual exhaust side exit set up. Still deciding on mufflers. Its either flowmaster super 10s or the flowmaster 40 series
i wish I had the older year . yours is going to be a beast !!
@@wolfwalker23 thanks man. I just sent the heads out to be rebuilt but we are at war. Just got word marshal law has been declared and several people in political positions have been arrested. Including the pope. I think my project is put on hold for the moment. Stock up on supplies at your earliest convenience
@@frostybud6217
Are you nuts?
That's crazy, it would've been better for the smog test with the throttle body set up
unfortunately, the smog shop would reject it on sight. They know an 86 doesnt run a TBI. instant Fail due to improper equipment.
So I do need to swap the distributer with a different one? And basically just take all the wiring from the tbi and put on the carb intake and carburetor and it should work fine correct?
Yeah, it's going from hi tech to older tech. So it should be simpler than the original. (Simple wiring etc...)
Nice Monte Carlo
1976 Monte Carlo. I owned since 1997. I had to sell it in 2019 :( I loved that car. went through hell and back.
What all did you do to swap on a carb????? I have a 383 stroker with a tbi and I want to put a 4 barrel quick fuel diamond series on it
Basically mine had some of the old wiring and basics for the carb setup. But the 5 second version is you switch Intakes and distributors. Few wires and hoses. Fuel pressure regulator
got question for you ....i just rebuild my chevy 350 1990 k5 blazer i converted it over from tbi to carb ..i did a few up grade on the engine high performance intake headers 3' pipes all way back up graded the cam to a howard rattler cam 525 intake lift 535 exhaust duration 227/235 lobe separation 109 center line 103 i still the same factory heads on there i believe they the swirl port heads ..i no i should have went with some better heads but the engine was already done. i put a brand new 1406 edelbrock carb on it right out the box every sence i put that carb on there i been using alot of fuel i set the carb best as posible ..im using a awful lot of fuel just with it iding..i have my pressure regulator set at 5psi..dont no why im losing so mush fuel
the carb is a drinker! I maybe get 8-10mpg maybe
@@wolfwalker23 no my carb should not be dumping fuel like that ..i were told my cam is pretty big for that carb that cam dont pull that mush vacuum so im gonna have to get that calibration kit and adjust everything and plus i got the header with 3' pipes all the way back
How did you adapt the TBI wiring harness for the fuel pump and HEI distributor?
All that stuff was pre wired. When I took off the TBI and the old distributor, I put a new HEI and an electric fuel pump/carb
I’m trying to do this to my truck but I have the 4l60e transmission is that going to be a problem??? Need your responds please!
Same
The answer is yes, the 4l60e is computer controlled and the engine management uses the mass air flow and especially a throttle position sensor so the electronic trans can downshift. They do have kits to add a tps to them! Hope that helps man!
my brother i got to take my hat off to you because you got alot of patience to go threw all that work ..do it seems like you have more power with the carb..or the tbi is better
Thank you! The carb is much better. I think if it was all done professionally, the tbi could have been better. The previous owner made many mistakes.
You didn't change out your cam, it's still stock?
What did you set your base timing too?
I picked up a 77 Sierra K15 with a 350 TBI out of an 87 Suburban in it. I'm planning on doing a carb conversion putting the truck back to the way it should be , I have all the parts needed and know what I gotta do but can't find any ignition timing specs for this engine anywhere.
Kept the stock camshaft picked up a Weiand intake, Holley 4150 carb, Try-Y headers, Accel HEI distributor, new wires and plugs.
my timing is still under construction. I did it by hand and its ok. need to get a digital timer !!!
@@wolfwalker23Thanks for getting back to me,. I'll say it again, you did a beautiful job man.
Picked mine up in November and it snowed the next day. Just starting to warm up here and can't wait to get her going. It didn't run when I got it, sure will be nice to hear it roar.
What about when you had to smog it? Did the smog person make a big stink that the tbi wasn’t installed?
The TBI was not original to my year of 1986. The guy before me put it on. So it wouldnt pass smog with the TBI on. I had to go original again.
@Wolfwalker23 I live in good ol California..City of Turlock... Im debating on a installing a tbi 5.7 with computer and all that stuff I was told that the engine im taking out of a newer vehicle it has to be registered as that vehicle im taking the engine out of , So just watching your video. I can go with newer 5.7 center bold engine and put smog legal intake and carb and im good to go have it inspected at a smog station? If you can give me some advice please.. BTW my truck is a 1979 chevy California smog
Hey, so I have two older model chevys and they never checked the block numbers or how the bolts are configured on the heads. Maybe some shops might actually look at the block number but I doubt it. As long as you have a carb and engine size that is the size your VIN is assigned to , you should be fine. The TBI wont pass, but you can swap all that after.
yes could you send me a video off how to do the wiring on that carburetor change over
LOL. One hot wire to the choke stat when the engine starts or optionally when the key is on.
Simple as long as u don't have a 4l60e trans bit even then just a few wires to redo and a tps kit on the carb
Nice video I'm a be honest ppl spend extra money just buy the correct intake a shop did this same thing for a crate 350 tbi I put in 87 cutlass and it was done terribly it began to leak so i swap to air gap rpm
Right on
hey i got 1990 k5 blazer tbi i rebuild my engine with a few up grades nothing big 3704 edelbrock intake headers 3' pipes rings and heads pretty mush stock i up graded my torque converter to a 2000 to 2400 stall... have a xtreme energy cam hydraulic flat tappet 4374/444 lift 206/212 duration 112 degrees it the next step up from stock i thought it would run with my computer with out messing around with the chip but i were wrone my buddy help me build it he no more about the high performance racing stuff..this have been a nightmare for me .i had to get my chip programed..and this is my second chip he made when i frist put the engine in with the factory chip the engine sound good but it didnt have no power like it shouild and would not idle the engine would surge up and down and cut off the frist chip it got alittle better where it didnt shut off but the power and acceleration speed wasnt there i can take off from a start and get into it and when i get about 45mph or about 2000 rpm i start to lose power no fuel it gradually picks up speed slowly ..the guy that did the chip said thats a good thing because there more room to turn the fuel up but i have to change the regulator spring in the tbi so im waiting for the other chip hopefully i should be good ..i really wanted a bigger cam because i want to hear it...but i was on a budget with my money ..if i would have none i were better off with the holley sniper EFI...BY NEXT SUMMER IF EVERY GO OKAY IM GONNA GO THAT ROUTE AND PUT A BIGGER CAM IN THERE THAT WHAT I REALLY WANT IM NOT SATISFIED WITH THE SOUND AT ALL..
It ain't got no stock roller cam ?
Im staying tbi with the tbi adapter so I can run my single plane intake with my 383
what distributor did you go with when swapping to the carb? was it even possible to use the factory one?
the distributor that goes with the TBI is different than the carb one. I used an older distributor from my old 1976 monte carlo in the end.
the company that did my chip they are in littleton ,co name is command performance engineering they are on line edelbrock told me about them...
I have same engine in my 88 Chevy half ton , but I got motor out of a 97 chevy , was (TBI) but switched it to a 4 barrel but I can't get my fuel pressure right cause am I still running the electric fuel pump also
you can get a fuel pressure regulator, and then buy a gauge as well to install next to it. Easily adjusted down to 3-6 psi. Whatever your carb needs !!
Thanks for the video I'm going to do the same to my 94 truck
Let me know how it turns out !
@@wolfwalker23 I am trying to put a 600cfm edlebrock on a performer eps intake small block mild cam. Into a 94 suburban. If we could talk about transmission do I need anything to hook up also wanted to convert the motor to serpentine like original motor but missing a bolt hole in the head on the motor I'm putting I what should I do
How did you convert the 2 fuel lines
I capped the return line to the tank. I could have bought a fuel pressure regulator with a bypass but it was sixty dollars more. The other is a standard fuel line from the tank, to filter, to fuel pump, to fuel pressure regulator.
i have 1987 USED TBI ENGINE IN CUSTOM CHEVY VAN IT ONLY WORKS AT HI IDEAL I WANT REPLACE IT WITH CARBRATOR AND MANIFOLD DO YOU HAVE TO REPLACE THE DISTRIBUTOR FOR OLDER STYLE AND HOW DO YUO HOOK UP THE RETURN FUEL INES
yes the distributor must be replaced as well as the coil. I did not hook up a fuel return line. It is not too difficult, there are videos about it.
Why stick with the egr? How does it work without the computer?
It is required for the smog. It is powered by vacuum hose. all manual.
What did you do about the pully. Where did you buy the pully that goes on the front of the crank from switching over
I ended up buying a A/C delete pulley. It just bypasses the airconditioning. other than that, I didn't mess with any pulleys on there.
They sell universal push in slots that change intake angles
Wayne Green we're at
you got the 700 r4 did u have to get the convert lock-up controller for the trans
nothing like that
The ports in the front where did u hook them up to
I need you to do this to my 89 suburban
It should work nice on that model !!
hi there, i would like to know where i can purchase one of these for a Cheyenne 85’
350 motor, any links you can recommend would highly appreciate im trying to rebuild my dads truck for him 😭 also how much horse power would this give it? thanks much!!
My carburetor is an edelbrock 1406 carb. It will give a little extra hp than the stock quadrant, but not a lot.
Great video, I have a 1995 Chevy 2500 with a tbi 2 barrel, I want to convert it to a 4 barrel
I'd like to see it ! I love Chevys
@@wolfwalker23 I will, I have half the parts now, msd box, universal msd plug wires, I want to get the jegs vortec cylinder head kit, comes with everything, heads, intake, cam, lifters, push rods, all for $1200, only thing not included is rocker arms, then I get the msd fuel injection kit, msd transmission kit for 4l80e transmission, then the Holley fuel pump for the tank so I can use an fuel lines, got the same fuel pump for my mustang, that’s the plan anyway
I’m probably going to connect the msd ignition box and transmission unit inside the cab under the back seat so the engine compartment isn’t cluttered up
going MSD is the way to go I think. It is on my wishlist for sure !!!
What kind of fuel pump did you use did you keep the electric one in the tank? If so how did you wire it in and what about all the other electronics with the gauges
On mine there was only an electric on the frame. I didn't have one in the tank. Maybe they removed it? I dont know. I replaced the pump with a standard after market electric. 40 bucks
I'd move out of that state!
just have to pay 400 for an illegal smog :(
Good video! I've got a 90 suburban with a 350tbi in it and im thinking of doing the same. You mentioned something about CA smog regs bot allowing for a mod, do you know if that kinda swap would fit into our BS smog regs?
my particular truck originally had a carb, then the other owner put the TBI on from a newer year motor. So when I switched back to carb, it wasnt an issue for the smog. If you change a TBI from a 90 back to a carb, smog guys will cause trouble for that!
Put it this way man if you're in California you cannot change anything on your vehicle that doesn't come from factory or it will not pass smog any vehicle besides a 1975 or older
Hi, Good way to go,BUT you never said how you rewired the ignition system with no computer,and an EGR valve should have made it's way to the garbage.All you need is a pcv system.With total adjustability even Cali,test should pass.ThanX for the video.
EGR is required for California smog tests. It sucks, but yes. The wiring to the ignition is a lot simpler without the computer. Buy an HEI pigtail for 5 bucks or less and just hookup the wires that are already there, black, red, and run the green to a tach if you have it.
Thanks Brother....I wouldn't know about Cali.I live in N.Y. It's a little less restrictive ,but I'm sure that will change at any time.You never know.
@@wolfwalker23 try going to another inspector in your area also there are ways of making things appear to be there even though they aren't really 😜
Great video brother. That's the same scenario with my daughter's k5 blazer. My question is does it have a smog pump and a charcoal canister
Stock from factory.
It has a charcoal canister, but I don't think this particular vehicle had a smog pump. There wasn't one on it when I bought it, and there were no rails on the exhaust etc..
So did It pass smog?
Hello! A really good video.
Question can a chevy 1990 350 intake fit a 95 305
it should work. as long as one is not vortec and the other is, etc... If they are both basically stock, then the bolt patterns are the same and they are inter-changable.
What website did yo I order the fuel pressure regulator from?
I bought it from Amazon. I believe the brand is Spectre.
I have an 84 K5 Blazer 4x4.
Just bought a 1986 blazer. What Timing did you end up with? My blazer is slow off the line, and kinda pops at idle
I just did it by ear. It is not perfect, but I just timed until it purred.
Hey man, I'm loving the Blazer video, you sound like a Narley dude, for being able to do that. I just picked up my first c10 , I wanted to ask, what kinda or how did you purchase your distributor,
I bought the distributor on Amazon. It came with a coil, ignition computer, rotor and cap. Make sure to order the wiring harness too. it is like 4 dollars. here is the link for 46 dollars www.amazon.com/dp/B074PPR811/ref=asc_df_B074PPR8115481460/?tag=hyprod-20&creative=395033&creativeASIN=B074PPR811&linkCode=df0&hvadid=241969781511&hvpos=1o1&hvnetw=g&hvrand=9962277304616757875&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031222&hvtargid=pla-441025189081The computer was bad inside so I replaced it with an MSD ignition computer. I don't really recommend this distributor as the quality seems cheap, but I went ahead and tried it out.
Hi nice video I am trying to do this to a 1989 Chevy Silverado 2500 because it is starting to have problems and is a good truck in good condition but one thing what brand or type of distributor did you any part number in particular
I used a stock chevy 350 distributor from my old monte carlo. It wasnt anything special. I would like to get a better one later for sure though.
They just had the computer sitting in there like that?? Wow that’s no good
The guys that did the previous TBI install, didnt do the best job. I was happy to remove all that stuff!!
I have the same engine .came off a firebird 5.7 .i set a weind intake on itdrilles the holes . Some how i got water in my oil . So i redid everything once again. But this time added some silicone to the water ports .im thinking maybe the intake sits a little lower than it should .what are your thoughts .? I need help .
i always silicone around the water ports and the ends too. That gasket has to be on there really well, torque, etc.
@@wolfwalker23 thanks buddy !
Good work. Got a 90 350 5.7 Im considering the swap out to. Hate Hate Hate the OBDI System! Got your numbers on the carb an manifold
Q1. Whats your mpg now?
Q2. What info did u use to match carb to manifold (and did u eliminate one of the carb spacers since egr flipp'd sides?
Q3. Stock E.manifolds or?
Q4. Exhaust... 2 into 1 or, 2 straight back (details if applies)
Thx.
14mpg maybe if i dont 4bbl hard. i still used the spacers to get the egr clearance. stock e manifolds. 2 into 1 :(
Thanks for the reply. Always follow the rule.... Air In.... Air Out. I have read more modifications where those whom have insured air into the engine, and, have swapped out exhaust headers, modified exhaust... whom have show good resuts.
I'm still where your at. (somewhat), but when money presents itself, I'll be doing more.
Wait… You couldn’t have fuel injection??
it was a 86 truck with 1988 fuel injection. = no :(
Does anybody make a new 4 barrel carb intake that bolts up to the new 87-95 motor’s?
I know they make one, unsure of the model number. Edelbrok of course. Almost all the same except the bolting.
What kind of fuel regulator did you use ? Did it have a return line ???
Spectre fuel regulator. No return.
Thats cool you can do that!
What power steering hose did you use? Also what throttle cable bracket did you use? I am converting a 1989 tbi engine to my 85 c10. Serpentine belt is so much better than the factory belts.
The power steering hose looks like the stock, high pressure hose. It is leaking... Needs replaced. For the throttle cable bracket, I used the edelbrock bracket and then crafted a custom extender for the TV cable (700R4 tranny)
wolfwalker23 ok thanks for the information.
With them adapter bushings u order did I really need to drill it out in order to use them bushing
The bushings are so that a straight up and down bolt, will push diagonally on the slanted manifold. If you are using an old manifold, on a newer than 88 block, you would have to drill them out. If you have an old block and manifold you are fine. If you have a new block and a new manifold you are fine. My old manifold ended up worked ok after drilling and buying the bushings, but then I replaced it with an edelbrock intake that had the new bolt pattern but also fit a carb.
Was that engine stock? I’m about to install an 86’ Block with 87’ heads that was swapped to EFI. I’m ditching it and going to Carb as well. Reason I’m asking is it’s going into an 57 Chevy truck. SM465/NP205. Think engine will be strong enough to stock? It’ll be pushing some weight around 👍🏻
The engine in that TBI video was from some kind of late 80s chevy 350 stock. It was ok, but I ended up buying a new block from Autozone and swapping it.
Have 1988 I am doing this weekend usen the new one to get rid the tbi fuel system and put a 4 barrel on it let ya know how goes on 350
Good luck on your install !!
how’d it go I’m looking into doing this to my 89 350
So did your truck ever pass smog?
I wanted to do the same with my 84 blazer, but mechanics told me that I wouldn't be able to pass smog. So screw it, I'm leaving CA anyways and just going to keep it carb for now.
I ended up blowing the heads on the old block.... replaced the engine, but STILL haven't passed yet.. something with NOX... might need a whole new carb.
@@wolfwalker23 What keep kind of carb do you recommend? My truck is a 84 chevy blazer silverado, 5.7L.
I replaced mine with one that's clossest to the original that was in truck. Now I just going to replace when I buy a crate engine, with one that has more balls.
@@wolfwalker23 Sucks to hear that you blew the heads. Would like to hear if you do ever make it smog legal.
I have a 61 Chevy c10 with a 4 barrel that’s ive been trying to fix up after it was given to be and sealed from a big block to a small block but don’t know much about cars, anyways, the throttle is the part I don’t know how to get past. There’s a cable from the transmission that seems like it wants to go to the carb but it’s not long enough and I just hooked up a wire with a lock to the gas pedal and was curious on if the cable that’s connected to the transmission vital? It was converted from a standard to an automatic also.Thanks!
More than likely, that is a kick down cable. When you floor it, that cable gets pulled and drops the tranny down a gear. This is for quick acceleration. If you do not have it in use, it will not harm anything, but you might miss out on that power when you are trying to pass someone or go quick off the line. My cable has been broken on my Monte Carlo for sometime now and its just fine. Not as quick but not harmed.
wolfwalker23 it was the kickdown cable! Just got it installed and the truck just pops now so it probably the timing on the carb so it should sound just as good as your truck!
Keep tinkering man. Let me know how it goes.
Oh I forgot to ask you if it passed smog after repairs
Still struggling around with smog, and I even put a whole new engine in...
Something with NOX. I think my Carb my have some issues.
I've been doing lots of research on this type of issues. And talked to my local smog tech. .he says all emissions components have to be installed upon time of smog
And this vehicle came with cats, 02 sensor,smog pump, egr valve ,map
air control valve, pcv. I have a schematic of an 87 suburban with a 5.7 liter I'm sure it's close. And I also have a picture of smog components for your actual year i got from the dealership parts guy. If you are interested. Not really sure how to send it through utube.
Thanks again for responding to my questions. Lots to do on my daughter's K5 blazer.
@@wolfwalker23 move out of CA and you don't have to worry about it anymore. I did. Best move I ever made.
Is it Manual ? I did the same thing on my 96 Silverado but now I’m having issues with my auto trans
auto trans. 700 R4
Did you use a end tank electric fuel pump or end line fuel pump?
I placed an electric pump on the frame about halfway from the tank to the engine.
As well, There was no pump in the tank when I removed it and checked it out. At least from the previous owner.
By any chance do you still have those pro products angled bushings? I need them!
i threw them away :(
@@wolfwalker23 I figured it out jegs sells some under there name that work. Pro products have been sold out for months now! Thanks for the reply!
what trans u have in there is it the 700r4
yes
Why did you remove the computer?
The computer is only used for the TBI setup. It is not found on the original 86 truck that I have.
How were you able to make the transmission still able to shift without the computer.?
The transmission is a 700R4. It is controlled by a Wire that goes to the carburetor linkage along with the throttle cable. It is called a TV cable. The 350 turbo tranny is also controlled by something similar "kick down cable". These are both mechanical and non electric or computer. Even with the TBI stuff and computer on the Blazer, it still used the TV cable, non computerized.
@@wolfwalker23 how do I find out if I have a 700r4 or the newer 4l60e I have a 1989 1500.
You can't tell the difference between a 700R4 and a 4L60E by the oil pan as they are nearly the same. If the transmission has a large 18-pin electronic connector above the passenger side pan rail, it's a 4L60E, as seen here. If it has a cable connection near the cooler lines on the passenger's side, that's a 700R4. **** It says the 4l60e wasn't in use until 1993. so its probably a 700r4 if overdrive or a turbo350 if it has 3 gears.
I'm pretty.sure that 88 they were using the 700 r4
my 88 chevy Scottsdale has a 700 R4@@glennmanchester1568
Do you still have the engine wiring harness and the body harness? Please contact me asap
Sold the whole setup for around 80 bucks or so. :/
I have a 1988 350 tbi out of a suburban and a carb intake from a 1969 307. Can I do what you did and drill it out and get the pieces for the bolts?????
Yep, it worked for me !
If someone can help me out here ,I’m doing the same carburetor exchange,and was told I didn’t need to change the intake,that there was a adapter that goes on the intake so the 4 barrel would fit I would appreciate any input
what kind of carb / intake are you working with currently?
Where does the EGR valve hose run into
Back of tbi
So tell me this, once you took out the computer an etc... How many lights did you have on upon your dash/aka dummy lights... Is it a Christmas tree now?
I think the previous owner may have disabled the check engine light. I have no lights popping on. He added the fuel injection system to the older model truck. I just changed it back to the original carb setup. I think if the truck is designed to have the computer, you will have some lights popping up when removed. But mine never come on.
@@wolfwalker23 another question on this topic. How did you pass smog in California, with out the check engine light coming on? I had an S10 once and the check engine light was out, so the guy didn't pass me. Got the light fixed, went back and passed.
Engine light on my 84 Blazer, does not go on either. Need to get that fixed as well.
What vacuum lines did you keep? Brake booster and vacuum advance?
correct. it is bare minimum. One to the carb (vac advance), one to the charcoal can, brake booster, and that is about it. it was fairly simple.
Nice video .. i have 90 silverado 7.4 th400 and i slapped a holley in it and my question is do i need the ignition control module, tps , map sensor,oxygen sensor? Also on the fuel it runs but shuts off but if i step on the pedal it would stay on untill i let go so what can i do ?
if you put a carburetor on there, it should bypass the TPS and all that. You would replace the intake with a carb intake and all the computer stuff can be bypassed.
What wire harness n computer did you use for the swap?
The stuff that was in there was from some stock 88 and newer motor. I removed that stuff and put the carb in.
What size drill bit did you use for the holes
I don't remember :( I just know it was a Kobalt brand for metal drilling, it was gold color. I just took the bolt in to home depot, and found a bit that looked a slight bigger.
Thanks for taking to the time on such a great video! I’m in the same position. What was your final cost( approximately)?
It was under 500$ I had the carburetor and distributor. I just had to buy the intake and some other small things.
Too bad you didn't throw the egr and charcoal canister the bush at the same time
I wish I could have :(
How much mpg are u getting 🤔
10-12 mpg
Is there any wiring that goes into the firewall and if was what did you do with them and nice truck runs good with carb
I didn't have to do anything in the firewall. It was all in the engine compartment.
@@wolfwalker23 how do you hook ignition to the turn key? Mines a 97 im doing but im sure there identical there.
What Cain of fuel pump you use?
it was one that the local autozone part shop sells. electronic, maybe 45 dollars? universal style
@@wolfwalker23 thank you
What fuel pump set up did you use 🤔 im doing this on a 79 caprice with the same block I bought the holley electric fuel pump the guys at summit said I could use it
I used a cheaper one you buy at the auto parts store. it wasnt a name brand or anything. I only need about 4.5 lbs of fuel pressure, so I didnt go big on a pump.
Amigo tengo un motor 350 Chevrolet tbi recién echo el problema es q en frío marca más de la mitad el medidor de aceite y luego viene callendo a 0 cambie bomba de aceite otra ves y nada quite el tapa válvula y apenas medio le llega aceite más no sale a chorrito le hice servicio al radiador cambie aceite nuevamente y nada. Ayuda q puede ser..??
Hay una pestaña en la que debe encajar la muesca del distribuidor. Cuando coloque el distribuidor, la muesca debe colocarse en la muesca en la parte superior de la bomba de aceite. A veces hay una varilla que se extiende. Entonces, si no está en la muesca, el aceite no se bombea por la acción del distribuidor.
@@wolfwalker23 no entiendo mano de esas muecas
Hey nice Blazer. I'm in southern California and I'm getting ready to switch to from carb to Fitech. What problems did you run into? You said, you are not to modify to TBI?
Unless you have a buddy that does smog test, you cannot legally change from carb to TBI or fuel injection. My truck was already fuel injection and I turned it back to carburetor. Anyways if you still do the conversion, you will have to get a computer, TBI, newer intake, the distributor, and the wiring harness. It wasn't too difficult. I prefer the carb better but many people like the fuel injection.
Think I'm going to stick with carb for now. I bought a rebuild and don't think it's working well. Thanks.
One more question, does your blazer have a check engine light? Not sure if doesn't have one or if bulb is out?
I have never seen it come on. I don't think there is one.
@@wolfwalker23 CA. If your check engine light doesn't come on, you fail smog instantly. Yeah I made up my mind, going to keep it with AZ license plate, because I'm moving there in the near future. So I'm going to keep it card. Screw smog. Thanks again.
Did u pull the pump out of the tank thoe
when I bought the truck it had no pump in the tank, and an electric pump on it for the TBI. That TBI pump is too much PSI for a carb, so I bought a medium strength pump with a regulator before the carb set at 4.5 psi. The pump always provides enough pressure, so I never worry about the tank pump. Make sure to use the fuel pressure gauge / regulator to check for that constant pressure though.
So I have a 1993 Silverado I’m installing a carbureted 350. I think I have a 4l60. Can I remove the computer and wiring harness too?
This forum thread tells all the how tos involving that tranny : www.s10forum.com/forum/f10/how-to-carb-swap-and-keep-the-4l60e-461481/
You’ll need a carb with a throttle position sensor to control the trans. A Holley or a quadrajet made from 1985 or 1986 with a tps or your other options would be to use a 700R4 trans or a standalone controller for you current one.
I did this, if I recall the speedometer is controlled by the computer, so it needed to stay anyhow.
Did you have reset the distributor or just sat it back in?
You need a new distributor when changing this. The distributor on the EFI system uses a distributor with a detached coil. The system on the carburetor uses a distributor with the coil on top of it.
Need a HEI Distributor
You don't need to fuel injection it's a good engine
Thank you !!
Did you use the tbi in tank fuel pump and just regulate it down?
I had no fuel pump in the tank. I have an electric fuel pump after tank on the chassis. I have a fuel pressure regulator right before my carb, dropping pressure down to 4psi. My engine has no slot for the mechanical fuel pump due to the year. I was forced to use the electric pump.
I used the one in the tank w a fuel pressure regulator on my 90 w a 305