4.3 Tip to share. I had a strange stalling, skip issue and no codes. Couldn't figure it out. Thought it was the fuel pump. With the engine running I pressed on wires and hoses looking for a vaccuum leak.. I pressed a wire and the engine shut off. Magic moment. The coolant sensor connector plastic stay tab had broken off. The coolant sensor plug was half in half out. I inserted and it started right up. I removed it and it stalled.. crazy issue to locate but I wanted to share with others.
This is the best 4.3L diagnostic I've seen! Like you I can't buy it, so I build it! Your description is exactly what my wife's truck was doing. Engine out now, spun rod bearing but you can bet I'm going to follow your lead. Thanks!
My Dad's '03 Blazer LS is having a similar misfire issue. I was going to replace the spark plugs/wires & dist. cap for him, but I'm glad I came across your videos, very helpful.. And by the way, Merry Christmas ahead of time!
Love your attitude & way of life man!!! Awesome wisdom for the diy ers out here like us, thanks 4 all u do 4 us looking for the correct info!!! Merry Christmas!!!! From Russellville,Arkansas
I was just watching your series because I have a 1995 Blazer. Now I've subscribed to your channel.... just to make this coming Christmas a little merrier.
Yep! I have an 02' Blazer ZR2 4.3 I've had this issue, moisture many times under my cap or a new cracked cap. It will run great for about a mile then start misfiring, in my cases. I also Replaced the distributor, rotor, everything. Wires, plugs, ECM, coil, etc. She's always perred like a kitten ever since. I was starting to get poor mileage & changed out all 3 of my 02 Sensors & now I get 16mpg in town. The sticker mpg for 2002! She's been just a great runner. Got a new HD Tranny rebuild also 4 years ago. The stock Sunshields snap easily on these..
Awesome video and I love what you said about TH-cam as far as making money, you do this to help others and that’s a rarity these days as I’ve always worked on my own vehicles because I can’t afford to pay a mechanic , also I take pride in doing my own repairs knowing it’s done right. BTW, my 02 blazer ZR2 is that same dark green as yours, personally I love that color and haven’t seen many green ones. I did discover my 02 is EGR delete after searching my entire engine and doing some research online that GM did delete the egr starting in 02, it’s strange because some 02”s have them, I’m stoked mine doesn’t. Such a bad idea recirculating carbon particles back into your motor.
Nice video. I just bought two of these Low miles and no rust on either but the second one seems to have every possible issue, including random misfire at 2600 rpm.. I was hoping it was the EGR. lol
Thanks for taking the time to make this-Ive got a 2000 my sister was going to take to the scrap yard😆bit by bit Im learning to fix it as i go-it aint fancy but it gets me where i need to go😉
Thanks so much for the info regarding the 4.3 engine. I really like to see your video on repainting of your chey truck, I have a 96 short bed I'm looking to repaint.
Absolutely my friend just a red blooded hard working 7 day a week god fearing country loving man here as well. MARRY CHRISTMAS as well my friend. You are truly helping more than you know! Thanks God bless and merry Christmas as well!
NOTORIOUS on the 4.3 - carbon trailing. There was a service bulletin yrs ago that says to TAKE OUT the vent screen b/c there's NOT enough ventilation to the inside of the distrutor. I also changed the crappy plastic distributor to an all aluminum. HUGE difference. Had a vacumm leak-same situation as you-but at the tee where it leads down to the fender tank. Hose was disconnected. AND the dang thing died while driving due to a CPS (crankshaft position sensor) fault. There's washers that come with those-make SURE it's in completely and NOT getting scratched on the end by the crankshaft. Other than that, I've got a 03 S10 w/ just over 500k miles on it now and STILL runs like a champ. Best thing about the 4.3 - SOOOOOOOOOOOOOO easy to work on w/o all the computer crap like today. Taking it down to the frame and TOTALLY restoring it cuz We've been to hell and back for over 20 yrs and She's gonna give Me ANOTHER 20. Nice vdo!
I have a 03 astro 4.3 Once a year I replace the distributor cap & rotor. And keep a cheap spare set in my van. Tried everything.. vent screens in and out, new distributor.. sealed around cap, dielectric grease inside etc.. nothing helped. I use the $60 Mallory or accell cap with $20 rotor. This cap has copper contacts. Seems to last longer
Another problem with the distributor is its actually too airtight believe it or not. There is ozone created inside the distributor cap as the rotor completes the circuit with the distributor cap contacts. There is a small vent with a screen in the base of the distributor that can get clogged with debris. Just punch the screen out so the ozone can escape.
On my 2000 Blazer I got a P0300 code changed the fuel filter, distributor cap and rotor, about to change the ignition coil and wires to see if that fixes the code...if not I'm change the egr valve to see if it clears the code.. that should cover just about everything. Tach 600 warm 900 cold rpms don't jump....gas gauge is accurate that should cut out the fuel pump....we'll see what happens. I do the work I can do myself because shop costs get too expensive.
Lmao they cut your video for saying Merry Christmas lmao. that's wild! 🤣 Good video though. I have a old 92 Astro 4.3. It was runin lean too. Changed the EGR and gonna be fixing the plenum real soon. Will probably start on it today.
thank you for the info. i have a gmc sonoma 4.3. spits when the weather is cold. code says mass airflow sensor. crank sensor. replaced crank sensor, got better but sill spits when weather is cold. will replace mass sensor and try that. this 4.3 has 286 thousand miles on it.thanks again.
I have a 97 Gmc Sonoma with a vortec engine and I had a misfire yesterday but I noticed that the oil pressure was very high? Any ideas on what I need to do?
I have 95 s10 blazer that when it's cold it seems like it's missing soon as it warms up it will start popping through the exhaust were wold I start it got new plugs wires cap button altnator was bad changed it nothing seems be helping could you give me advice thanks
I have a 2003 s10 zr2 I just purchased sight unseen. I sent my wife and friend to go pick it up. Long story short it dosen't run the best. Runs ruff on the lower rpms. Should I start with the distributor.? I do not have a scan tool.
I’m getting very bad run idling just like this when cold start but once warms up, Ryan’s pretty pretty good getting misfire codes. I’m wondering if you unplug the wire into the maf sensor should it stay running and does that mean it’s bad or should it stop running in that means it’s good
My 4.3 has a different intake. Its the Silverado, i changed plus wires distributor cap and button. Started her up she was idling fine, i gave her some gas let her idle started to put tools away and she jus vvvvvROOOOOMMM up to 3,500 hooked it up to a smoker cant find a vacuum leak
My 4.3 does something similar, but it’s after I’ve been driving for 10-15 minutes. I’m not sure what a misfire would feel like, but my truck basically turns off. I can still give it gas but it doesn’t go anywhere. Sometimes it completely shuts off but otherwise it’ll start up again after 5 seconds or so of coasting. I replaced the fuel filter yesterday and I’m still having the problem. Some people are saying it’s the fuel pump, injectors, relays and a couple other things. Any help would be appreciated! It’s a 1997 Chevy s10 4.3 vortec v6. Has an automatic transmission and 58,000 miles
I have a 2001 chevy blazer 4.3 v6 that has had the front Cat removed and the rear cat gutted? I have done everything to try to get it to run good put $$$ into it spider injectors, tune up, Maf sensor water pump,new distributor etc... I also have 02 sensors(have not installed yet) i bought since my code reader said bank one was bad . It still runs very rough I just want to get it running good sell... Any suggestions? Thanks for your time..
That was supposed to read change the spark plugs and the wires. LOL. Merry Christmas everyone. Might be time for a new distributor cap and a catalytic converter or two as well.
@@1ezeinda I did all that...its gone...I think it was a bad computer...just keep coming up with different codes all the rime...the first two blazers I owned never gave me issues...this was a piece of shit that I never should of bought...
4.3 Tip to share. I had a strange stalling, skip issue and no codes. Couldn't figure it out. Thought it was the fuel pump. With the engine running I pressed on wires and hoses looking for a vaccuum leak.. I pressed a wire and the engine shut off. Magic moment. The coolant sensor connector plastic stay tab had broken off. The coolant sensor plug was half in half out. I inserted and it started right up. I removed it and it stalled.. crazy issue to locate but I wanted to share with others.
This is the best 4.3L diagnostic I've seen! Like you I can't buy it, so I build it! Your description is exactly what my wife's truck was doing. Engine out now, spun rod bearing but you can bet I'm going to follow your lead. Thanks!
I do agree with, helping in teaching for the greater good for all. Thank you for your diligence and tenacity in life .🏞️👍
My Dad's '03 Blazer LS is having a similar misfire issue. I was going to replace the spark plugs/wires & dist. cap for him, but I'm glad I came across your videos, very helpful..
And by the way, Merry Christmas ahead of time!
Love your attitude & way of life man!!! Awesome wisdom for the diy ers out here like us, thanks 4 all u do 4 us looking for the correct info!!! Merry Christmas!!!! From Russellville,Arkansas
God Bless You Sir you have no idea how much you just helped me!
Ty for all the knowledge 🙏
I was just watching your series because I have a 1995 Blazer. Now I've subscribed to your channel.... just to make this coming Christmas a little merrier.
Thanks for adding this video it help me a lot I did all the work my self by watching ur video and save my self a expensive mechanic work 🤘👍
Great information. Thanks for taking the time because I'm preparing to diagnose my 98 blazer and I need all the help I can get.
Yep! I have an 02' Blazer ZR2 4.3
I've had this issue, moisture many times under my cap or a new cracked cap.
It will run great for about a mile then start misfiring, in my cases.
I also Replaced the distributor, rotor, everything. Wires, plugs, ECM, coil, etc.
She's always perred like a kitten ever since.
I was starting to get poor mileage & changed out all 3 of my 02 Sensors & now I get 16mpg in town. The sticker mpg for 2002!
She's been just a great runner.
Got a new HD Tranny rebuild also 4 years ago. The stock Sunshields snap easily on these..
Happy Thanksgiving and a Merry Christmas my friend. God bless.
Thank You and God Bless.
Awesome video and I love what you said about TH-cam as far as making money, you do this to help others and that’s a rarity these days as I’ve always worked on my own vehicles because I can’t afford to pay a mechanic , also I take pride in doing my own repairs knowing it’s done right. BTW, my 02 blazer ZR2 is that same dark green as yours, personally I love that color and haven’t seen many green ones. I did discover my 02 is EGR delete after searching my entire engine and doing some research online that GM did delete the egr starting in 02, it’s strange because some 02”s have them, I’m stoked mine doesn’t. Such a bad idea recirculating carbon particles back into your motor.
Nice video. I just bought two of these Low miles and no rust on either but the second one seems to have every possible issue, including random misfire at 2600 rpm.. I was hoping it was the EGR. lol
just wanted to say (thank you) for doing this video i have a 2001 chevy blazer LT 4.3 with this problem too
Thanks for taking the time to make this-Ive got a 2000 my sister was going to take to the scrap yard😆bit by bit Im learning to fix it as i go-it aint fancy but it gets me where i need to go😉
Heck ya Merry Christmas! Thanks for the good info.
Need more people like you.
Thank you 🙏
Merry Christmas and thanks for telling us about the yt episode -
Thanks so much for the info regarding the 4.3 engine. I really like to see your video on repainting of your chey truck, I have a 96 short bed I'm looking to repaint.
That truck i've seen it customized on the web with front flames green and black I think. I truly liked the look.
Thank you for the videos helps a lot!!!
I'm late to the party, thank you for the video. AND thank you for saying Merry Christmas!
Absolutely my friend just a red blooded hard working 7 day a week god fearing country loving man here as well. MARRY CHRISTMAS as well my friend. You are truly helping more than you know! Thanks God bless and merry Christmas as well!
Dude, I devoted to your videos and dedicating myself to bring back my lean engine!
Thank you you saved me thousands
Of dollars that is what my truck was doing plus the crankshaft position senser went out
Thanks, been fighting this miss for 2 years...and several caps, rotors, MAF, Spider., Distrbutor...on and on F... GM.
Did you ever get it figured out?
Please let me know you figured it out
Vacuum also affects your braking / brake booster and if your brake booster goes bad, your engine will not idle.
Thx' great job. Very informative vid!
NOTORIOUS on the 4.3 - carbon trailing. There was a service bulletin yrs ago that says to TAKE OUT the vent screen b/c there's NOT enough ventilation to the inside of the distrutor. I also changed the crappy plastic distributor to an all aluminum. HUGE difference. Had a vacumm leak-same situation as you-but at the tee where it leads down to the fender tank. Hose was disconnected. AND the dang thing died while driving due to a CPS (crankshaft position sensor) fault. There's washers that come with those-make SURE it's in completely and NOT getting scratched on the end by the crankshaft. Other than that, I've got a 03 S10 w/ just over 500k miles on it now and STILL runs like a champ. Best thing about the 4.3 - SOOOOOOOOOOOOOO easy to work on w/o all the computer crap like today. Taking it down to the frame and TOTALLY restoring it cuz We've been to hell and back for over 20 yrs and She's gonna give Me ANOTHER 20. Nice vdo!
Merry Christmas you are a good man thanks for sharing 👍
I have a 03 astro 4.3 Once a year I replace the distributor cap & rotor. And keep a cheap spare set in my van. Tried everything.. vent screens in and out, new distributor.. sealed around cap, dielectric grease inside etc.. nothing helped. I use the $60 Mallory or accell cap with $20 rotor. This cap has copper contacts. Seems to last longer
Ty for the video!
Another problem with the distributor is its actually too airtight believe it or not. There is ozone created inside the distributor cap as the rotor completes the circuit with the distributor cap contacts. There is a small vent with a screen in the base of the distributor that can get clogged with debris. Just punch the screen out so the ozone can escape.
On my 2000 Blazer I got a P0300 code changed the fuel filter, distributor cap and rotor, about to change the ignition coil and wires to see if that fixes the code...if not I'm change the egr valve to see if it clears the code.. that should cover just about everything. Tach 600 warm 900 cold rpms don't jump....gas gauge is accurate that should cut out the fuel pump....we'll see what happens. I do the work I can do myself because shop costs get too expensive.
Thats right keep on rockin brother!!!!!!!
Lmao they cut your video for saying Merry Christmas lmao. that's wild! 🤣 Good video though. I have a old 92 Astro 4.3. It was runin lean too. Changed the EGR and gonna be fixing the plenum real soon. Will probably start on it today.
Good explanation. U got my sub
thank you for the info. i have a gmc sonoma 4.3. spits when the weather is cold. code says mass airflow sensor. crank sensor. replaced crank sensor, got better but sill spits when weather is cold. will replace mass sensor and try that. this 4.3 has 286 thousand miles on it.thanks again.
Thank you very informative
Merry Christmas and Happy Independence day! god bless brother*
Thank you ,, what year is your vehicle?
Late but Merry Christmas to you to❤
Merry Christmas man. Little early
On the opening monologue. Damn right me too.!
Love your videos, very helpful. Merry Christmas
Merry Christmas.
My minds the same way. & its frustrating
what air flow module is it? you said it was lifetime warranty and not made in USA.
4:45 actually, the MAF just measure the amount of air coming in. As for air temperature, there is a separate sensor that detects temperature.
Which one is it my truck is having problems with it
I have a 97 4.3 s10 that misses at acceleration but idols good and runs good at higher rpm’s. I’ve replaced everything but the egr valve
Thank you again, and Hell yes Merry Christmas 🎄
Honest down to earth 🌍 man 👨
Thanks for the video, bro. U-toob can cram it.
How did you plug the vacuum canister?
I have a 97 Gmc Sonoma with a vortec engine and I had a misfire yesterday but I noticed that the oil pressure was very high? Any ideas on what I need to do?
Awesome 👏
where did you get the mass air flow and what brand ??
What scan tool did you have ?
I’m pretty sure the vacuum pod is needed to help in locking in the front diff 4x4
My 02 chevy s10 4.3 has a p0301 code pop up. What can it be? I changed my spark plugs, wires, and ignition coil already. Please help
fyi to stop the door dinging temporarily you can turn the door lock to closed … and then pull it back out later to close the door
Thank u for your help
I have 95 s10 blazer that when it's cold it seems like it's missing soon as it warms up it will start popping through the exhaust were wold I start it got new plugs wires cap button altnator was bad changed it nothing seems be helping could you give me advice thanks
Mine misses when its cold! once it runs for1-2 minutes its fine
Thank you for that
My 95 astro has good pressure n spark .wont start. Started running like it bad gas .(chugging) for two miles then stoped starting .turns over
I have a 2003 s10 zr2 I just purchased sight unseen. I sent my wife and friend to go pick it up. Long story short it dosen't run the best. Runs ruff on the lower rpms. Should I start with the distributor.? I do not have a scan tool.
I’m getting very bad run idling just like this when cold start but once warms up, Ryan’s pretty pretty good getting misfire codes. I’m wondering if you unplug the wire into the maf sensor should it stay running and does that mean it’s bad or should it stop running in that means it’s good
My 4.3 has a different intake. Its the Silverado, i changed plus wires distributor cap and button. Started her up she was idling fine, i gave her some gas let her idle started to put tools away and she jus vvvvvROOOOOMMM up to 3,500 hooked it up to a smoker cant find a vacuum leak
Going to try this
4wd uses vacuum also
Merry Christmas and thanks
P0300 is driving me crazy
I'm having a problem with my 2000 4.3 plugs wires and cap and botton replaced and at wide open throttel it gets a bad miss
Their 300000 ish motors goodness
Dont touch the sensors with anything...
our we all geting old haha good job
MERRY CHRISTMAS!
MERRY CHRISTMAS
Crc maf cleaner
Merry Christmas we’ll chat sometime I got a 4.3 driving me crazy peace out
My 4.3 does something similar, but it’s after I’ve been driving for 10-15 minutes. I’m not sure what a misfire would feel like, but my truck basically turns off. I can still give it gas but it doesn’t go anywhere. Sometimes it completely shuts off but otherwise it’ll start up again after 5 seconds or so of coasting. I replaced the fuel filter yesterday and I’m still having the problem. Some people are saying it’s the fuel pump, injectors, relays and a couple other things. Any help would be appreciated! It’s a 1997 Chevy s10 4.3 vortec v6. Has an automatic transmission and 58,000 miles
Sounds like you have a bad coil I had the same problem
Mr. Rush....what year is this 4.3 ? 1996 ?
I get a misfire code on cylinder 1. I changed the cap, rotor , plugs and wires. Bank 1 is running high over 10. Could it be the spider ? Thanks
Distributer cap and rotor
If u build it, they will come .
You want something you gotta build? It sounds like me,
Never change transmission fluid. 372k same fluid & filter.
2004 Avalanche 286,000 miles with no problems.
Trans did die but only after a couple weeks of towing a bobcat around behind the poor half ton truck.
My cousin, calls that CRS. Can’t remember 💩
Hey you should get ahold of me please.... i have the same motor that i can't figure out to save my life
TH-cam forgot that we live in a free country!
Merry Christmas
EVER SINCE BIDEN GETTING INTO OFFICE
THERE HAVE BEEN PROBLEMS AND ISSUES
WITH FREE SPEECH. MERRY 🎄 CHRISTMAS BRO. GREAT VIDEO.
The inside of my cap has blue burn marks in dide
I have a 2001 chevy blazer 4.3 v6 that has had the front Cat removed and the rear cat gutted? I have done everything to try to get it to run good put $$$ into it spider injectors, tune up, Maf sensor water pump,new distributor etc... I also have 02 sensors(have not installed yet) i bought since my code reader said bank one was bad . It still runs very rough I just want to get it running good sell... Any suggestions? Thanks for your time..
Also changed fuel filer and did pressure text..has over 50 psi..thax
Change the spark plugs in the wires. Go with ACDelco. You can get them on Amazon for cheap. Gap them properly. Boom Chevy Thunder again.
That was supposed to read change the spark plugs and the wires. LOL. Merry Christmas everyone. Might be time for a new distributor cap and a catalytic converter or two as well.
@@1ezeinda I did all that...its gone...I think it was a bad computer...just keep coming up with different codes all the rime...the first two blazers I owned never gave me issues...this was a piece of shit that I never should of bought...
he sounds lke johnny cash!
my light comes on and I have 2 cylinders 1&2 miss firing
I'm like you screw TH-cam but thanks a lot for the great information
put your vids on rumble and you won't have to deal with the censorship issue
What do u think it could be