Man I am glad I am not the only one that has had this problem I have an 83 c-10 and mine has been doing the same thing for 2 years. One of our local performance shops says they have this problem all the time with the snipers and it was my in line fuel pump was getting really hot after 10-20 miles of driving. Also it doesn't help that its hotter than hell where I live. Anyway after my 3rd inline pump they recommended putting an in tank fuel pump in, so we did that and I just burnt the 2nd one out this morning, all of these have been holley pumps and parts. I had the exact same experience with the holley tech team. Nice people but I got tired of sitting on hold and they told me the same thing they told you that I probably had a air leak in my exhaust system which I knew I didn't have. The local shop in my town said that they have had to warranty over 200 fuel pumps from them. So now I am going to pull all this junk off and put a mechanical fuel pump and a carb so I can actually drive my truck.
one of my four bores not dispensing fuel.. that was my problem. They request I send it back to them to fix it. before this though... holley ripped apart how I installed the inline fuel pump... they were wrong. it was the throttle body that was not dispensing fuel correctly. Don't give up to soon! When it's running correctly, it was the best addition I've done'...even with sending it back.
Sounds like a one off experience. everyone I talked with haven't had this problem or any to be honest, I have 600+ miles on my two barrel Holley sniper EFI. Sorry to hear about your experience and I hope you got your truck running.
I had a FItech on my Mustang, was great for a while, then it would just turn off for no reason while driving down the road, now run a quick fuel 650 double pumper, no more issues.
This popped up in the feed. Probably because I was looking at the various problems with the sniper system as I am getting a 400 Blueprint engine. Comes with a 950 Holley or buy up Sniper. You are not alone. These either work or are troublesome from the get go. When they are troublesome it's a bad story and not usually rectified easily from the vids on YT. They can work for a few minutes, not at all or a year but when something happens you are stuck. No thank you. Carb and HEI. I want the sniper to be reliable as 88-95 GM TBI but it is not no matter how much I want it to be. There would always be doubt if I have this system as soon as the engine hiccups it would be that sinking feeling. I don't want problems. Blueprint warrants their engines 30k miles or 50 months. Not getting caught in a vendor warranty trap where it's not our system call Holley. Like you said 2k dollars and there it is.
I have a MSD EFI on my roadster for a year now and it runs great , another good use for Cousy's . turn them inside out and use them for tire dressing last much longer then the sponge's you by .
@greasemonkeytv one of your biggest problems that may have caused your issues is that spacer you had under the sniper system. The intake has a divider from left side and right side and the spacer made it into one . Your not allowing and system to work proper. Not having the divider and over charge to gas flow and can cause it to back fire causing it to backfire Messing up the injector in the unit.
I am having issues with mine as well. I bought a 68 Camaro with it already on but it wasn't even running right when he sold it to me. The o2 sensor was bad at first then the fuel pump went out within a few months. I have been to two shops so far to have it tuned professionally but it keeps messing up after a few rides. I am going to sell or trade mine for a carburetor as soon as I can.
When you set the kit up did you initially do a process called "Rotor Phasing"?..Its important as it calibrates fuel and spark events and keeps the injectors and the PCM from fritzing out............
If your motors got a radical cam with a lot of valve overlap and not enough lobe separation, it’s going to confuse your ECU. Also I don’t care what Holley says, the sniper does not like the dual plane intake. For best results, you got to let the sniper control the timing, And not run a separate Distributor.
@@davesarena7091 I’ve seen otherwise . Single plane is more race car . After some research the dual plane is fine with a proper install and obvious proper intake for the engine as well.
Ive been debating going EFI for my 62 impala 4-door just to bring it back from the dead (has a 283 4.6L) but I've been really off-put by the hit-or-miss reviews on the Sniper kit and Holley's apparent crap customer service. Only other thing I've seen is that people aren't accounting for interference issues from the signal cables. You'd think Holley would wrap the O2 cable with some drain foil or something considering the EMI the distributor cables / alternators give off.
Man that sucks. Ive been watch sniper efi vids for about 5 months trying to determine if its right for me. I have a brand new summit 750 on my 454 in a 73 nova. When the setup was in my 74 nova it fired up first try and ran good. I was just having issues when i wanted to slam the gas. Dont really understand carbs so i figured i could go efi to solve that problem. But your experience has me thinking long and hard.
@@GreaseMonkeyTV do you know how to tune a carb? If so please make a vid. From my experience the summit carb was great when i first put it on out the box. 3 pumps and it fires up strong. Issues came when i wanted to WOT. It would choke, bog backfire then surge.
Least you were fortunate that it did not wipe a motor out. Had my el camino idling after installing all the hyperspark system on and engine shut off 5 min in. Turned the key on to check everything on the hand held went to restart it and it was hydrauliced because the injectors were stuck open. Unplugged the system pulled plugs and cranked it over and shot fuel out. Joy. So going pull the motor and make sure the bearings are not wiped out then go back to carb and do the progression ignition like you did.
so haapy to have choose an LS truck motor with multi point injection in my 86 C10, so reliable and cheap (cost me $500 for all the 6L motor ECM wiring ect...) to bad you have trouble with your
Takes 5 minutes, a shop-vac, and a bottle of soapy water to verify you don't have an exhaust leak. If you are that unwilling to troubleshoot then it's all on you bud.
69 Road Runner here and came to the same conclusion today. Throttle body, hyper spark all going in the trash. Can’t wait for the carburetor to get here.
When you first installed the system did you do a rotor phase check and verification to calibrate the fuel and spark events?..If you skip the process it makes the injectors fail because they overheat from not being sync'd right with the spark events in relevation to the pointer on the distributor........Theres adjustment points on the cap....If you still have the system Id be interested in seeing the burn pattern on the dist cap thongs....If the spark pattern isnt dead-on center on every pin or very close you werent phased correctly and was your overall initial problem that caused a snowball effect...
I wish everyone cared about what they sell to people... bought a c10 and the dude lied about most of it.. not till I got it home I started finding things amiss.. tried to call them back and got ghosted..
Glad I saw your video and didn't buy one. I really wanted one of those Holley Equipted stickers for my window. I put a jet engine in my Mustang last spring, and the chicks really dig me.
I see one throttle plate is black... That is interesting. Must be reversion or back firing through those relative ports/ cylinders. I’ve been thinking about using the xflow efi but not allowing it to control timing/ignition. But maybe not
The sniper runs better on certain engine builds than others. I had a motor recently built around my EFI. If your motor has a dual plane intake and your cam has a lot of valve overlap, The EFI will not run right. It will be even worse if the ECU is not controlling the timing.
So many possibilities. A little more strategy based diagnosis could have saved you some heartache and cash. Bummer. Awesome truck, nothing wrong with a good carb and HEI. I’m in the process of installing one now. We shall see. The last one I installed has been going three years
Sorry to hear that..... I just installed a Sniper on my SBC... Runs great, not that it ever ran bad... If it was not a year later I would offer to trade my HLY-0-86670RD - Holley Ultra Street Avenger Carburetors for your old Sniper setup.... I could use spare Sniper parts and you could get a great carb...
Wrong. I have a new kit. Can you say JUNK? Holley had the nerve to tell me its the inviroment. Never new iowa weather and a heated garage could cause such problems
90 % of the issues are poor installs . Devils In the details. Proper power and ground connections are key as are EMI and other interference issues. No brainer over a carb.
I was just about to buy one Sniper kit for my C10. This video made me change my mind. I guess I’ll stay with my carb
Man I am glad I am not the only one that has had this problem I have an 83 c-10 and mine has been doing the same thing for 2 years. One of our local performance shops says they have this problem all the time with the snipers and it was my in line fuel pump was getting really hot after 10-20 miles of driving. Also it doesn't help that its hotter than hell where I live. Anyway after my 3rd inline pump they recommended putting an in tank fuel pump in, so we did that and I just burnt the 2nd one out this morning, all of these have been holley pumps and parts. I had the exact same experience with the holley tech team. Nice people but I got tired of sitting on hold and they told me the same thing they told you that I probably had a air leak in my exhaust system which I knew I didn't have. The local shop in my town said that they have had to warranty over 200 fuel pumps from them. So now I am going to pull all this junk off and put a mechanical fuel pump and a carb so I can actually drive my truck.
one of my four bores not dispensing fuel.. that was my problem. They request I send it back to them to fix it. before this though... holley ripped apart how I installed the inline fuel pump... they were wrong. it was the throttle body that was not dispensing fuel correctly. Don't give up to soon! When it's running correctly, it was the best addition I've done'...even with sending it back.
Just a thought… but your fuel pump is literally right next to the exhaust… more than likely what the culprit was.
Sounds like a one off experience. everyone I talked with haven't had this problem or any to be honest, I have 600+ miles on my two barrel Holley sniper EFI. Sorry to hear about your experience and I hope you got your truck running.
I had a FItech on my Mustang, was great for a while, then it would just turn off for no reason while driving down the road, now run a quick fuel 650 double pumper, no more issues.
Yeah I had alot of issues with mine also, I just removed the sniper and installed a Edelbrock Avs2 and fuel regulator, works great now
Check your rotor phasing and calibrate it............Its very very important to get the fuel and spark events right....
How’s the avs2 working?
I've always been told the O2 sensor needs to be installed on an angle and not vertically, something about collecting condensation.
Just not pointed up from the bottom. That's when moisture settles in the sensor.
O2 needs to be pointed at least 10° up or more
Yes, for some reason they only work properly when you install them at as close to a 45° angle as close to your header or manifold as possible.
This popped up in the feed. Probably because I was looking at the various problems with the sniper system as I am getting a 400 Blueprint engine. Comes with a 950 Holley or buy up Sniper. You are not alone. These either work or are troublesome from the get go. When they are troublesome it's a bad story and not usually rectified easily from the vids on YT. They can work for a few minutes, not at all or a year but when something happens you are stuck. No thank you. Carb and HEI. I want the sniper to be reliable as 88-95 GM TBI but it is not no matter how much I want it to be. There would always be doubt if I have this system as soon as the engine hiccups it would be that sinking feeling. I don't want problems. Blueprint warrants their engines 30k miles or 50 months. Not getting caught in a vendor warranty trap where it's not our system call Holley. Like you said 2k dollars and there it is.
I have a MSD EFI on my roadster for a year now and it runs great , another good use for Cousy's . turn them inside out and use them for tire dressing last much longer then the sponge's you by .
Thanks for the tip!
@greasemonkeytv one of your biggest problems that may have caused your issues is that spacer you had under the sniper system. The intake has a divider from left side and right side and the spacer made it into one . Your not allowing and system to work proper. Not having the divider and over charge to gas flow and can cause it to back fire causing it to backfire Messing up the injector in the unit.
Thanks for watching. Holley actually recommends the spacer if your intake is divided.
I am thinking about getting the Sniper myself. I don’t trust those band clamps to hold the O2 sensor bracket..
The koozie idea was worth the thumbs up
Looks like installation error
I am having issues with mine as well. I bought a 68 Camaro with it already on but it wasn't even running right when he sold it to me. The o2 sensor was bad at first then the fuel pump went out within a few months. I have been to two shops so far to have it tuned professionally but it keeps messing up after a few rides. I am going to sell or trade mine for a carburetor as soon as I can.
When you set the kit up did you initially do a process called "Rotor Phasing"?..Its important as it calibrates fuel and spark events and keeps the injectors and the PCM from fritzing out............
If your motors got a radical cam with a lot of valve overlap and not enough lobe separation, it’s going to confuse your ECU. Also I don’t care what Holley says, the sniper does not like the dual plane intake. For best results, you got to let the sniper control the timing, And not run a separate Distributor.
@@davesarena7091 what about the dual planeairgap?
@@jonhathaway2537 air gap allows air to flow under carb through intake, that’s all. dual plane doesn’t work right. Single plane is the best way to go!
@@davesarena7091 I’ve seen otherwise . Single plane is more race car . After some research the dual plane is fine with a proper install and obvious proper intake for the engine as well.
I like your wheel setup.
Thanks. They are covered in an earlier video.
Ive been debating going EFI for my 62 impala 4-door just to bring it back from the dead (has a 283 4.6L) but I've been really off-put by the hit-or-miss reviews on the Sniper kit and Holley's apparent crap customer service. Only other thing I've seen is that people aren't accounting for interference issues from the signal cables. You'd think Holley would wrap the O2 cable with some drain foil or something considering the EMI the distributor cables / alternators give off.
Man that sucks. Ive been watch sniper efi vids for about 5 months trying to determine if its right for me. I have a brand new summit 750 on my 454 in a 73 nova. When the setup was in my 74 nova it fired up first try and ran good. I was just having issues when i wanted to slam the gas. Dont really understand carbs so i figured i could go efi to solve that problem. But your experience has me thinking long and hard.
Summit carb install video is going up tonight! Thanks for watching!
@@GreaseMonkeyTV do you know how to tune a carb? If so please make a vid. From my experience the summit carb was great when i first put it on out the box. 3 pumps and it fires up strong. Issues came when i wanted to WOT. It would choke, bog backfire then surge.
@@theshark2804 I actually could do a vid, but there are so many better guys out there. Check @Summit Racing has some high quality vids.
Keep the carb just spend $130 on a afr guage so you'll see what the carns doing running rich or lean and tou tune jets accordingly
Best part was the coozy idea for sure
Least you were fortunate that it did not wipe a motor out. Had my el camino idling after installing all the hyperspark system on and engine shut off 5 min in. Turned the key on to check everything on the hand held went to restart it and it was hydrauliced because the injectors were stuck open. Unplugged the system pulled plugs and cranked it over and shot fuel out. Joy. So going pull the motor and make sure the bearings are not wiped out then go back to carb and do the progression ignition like you did.
so haapy to have choose an LS truck motor with multi point injection in my 86 C10, so reliable and cheap (cost me $500 for all the 6L motor ECM wiring ect...) to bad you have trouble with your
I've had a sniper on my 79 Trans Am for a year now. Not problems, love it. My junky carburetor is in a box on the shelf.
Bad injector not injecting, more air than fuel and o2 picked it up.
Takes 5 minutes, a shop-vac, and a bottle of soapy water to verify you don't have an exhaust leak. If you are that unwilling to troubleshoot then it's all on you bud.
A dead cylinder will look like an air leak too. You just need to have a clue to run a sniper.
69 Road Runner here and came to the same conclusion today. Throttle body, hyper spark all going in the trash. Can’t wait for the carburetor to get here.
Ever since I put the hyperspark in my 89' gta it over heats......
When you first installed the system did you do a rotor phase check and verification to calibrate the fuel and spark events?..If you skip the process it makes the injectors fail because they overheat from not being sync'd right with the spark events in relevation to the pointer on the distributor........Theres adjustment points on the cap....If you still have the system Id be interested in seeing the burn pattern on the dist cap thongs....If the spark pattern isnt dead-on center on every pin or very close you werent phased correctly and was your overall initial problem that caused a snowball effect...
Thanks for watching! The dist was set in phase according to the instructions from Holley.
This is not true at all. The injectors won't over heat due to a distributor out of phase at all.
Is it the sniper or super sniper cause the sniper has issues but super snipe is excellent
Dual plane intake is your issue. It causes a fuel distribution issue. So not a Holley issue, just a bad combination issue.
I wish everyone cared about what they sell to people... bought a c10 and the dude lied about most of it.. not till I got it home I started finding things amiss.. tried to call them back and got ghosted..
That seems to happen all too often. Major reason we started posting every step of the builds.
Did you sell it
Glad I saw your video and didn't buy one. I really wanted one of those Holley Equipted stickers for my window.
I put a jet engine in my Mustang last spring, and the chicks really dig me.
I see one throttle plate is black...
That is interesting. Must be reversion or back firing through those relative ports/ cylinders.
I’ve been thinking about using the xflow efi but not allowing it to control timing/ignition. But maybe not
For some reason I didn’t see you addressed that till after i commented.
Duhhh ooops.
I'm from Mexico, I have a 1986 double cab Chevrolet, I don't have a lot of money. don't you sell the holley?
Helio already sold.
@@GreaseMonkeyTV :(
How much ??
Did you end up selling the kit ?
Yes. Thanks for watching!
Your fuel pump and filter are very close to your exhaust. Hot fuel is unhappy fuel
The sniper runs better on certain engine builds than others. I had a motor recently built around my EFI. If your motor has a dual plane intake and your cam has a lot of valve overlap, The EFI will not run right. It will be even worse if the ECU is not controlling the timing.
Go KOOSIE..... two thumbs up
So many possibilities. A little more strategy based diagnosis could have saved you some heartache and cash. Bummer. Awesome truck, nothing wrong with a good carb and HEI. I’m in the process of installing one now. We shall see. The last one I installed has been going three years
Sorry to hear that..... I just installed a Sniper on my SBC... Runs great, not that it ever ran bad... If it was not a year later I would offer to trade my HLY-0-86670RD - Holley Ultra Street Avenger Carburetors for your old Sniper setup.... I could use spare Sniper parts and you could get a great carb...
How much for it all? Did I miss that part?
$1,200 + shipping. The replacement throttle body shows to be here tomorrow.
GreaseMonkeyTV do you still have everything for sale?
@@roberthaysus All sold within 2 hours of listing it.
@@roberthaysus ive got two kits if you're interested, one new one used.
@@MrJosephfunk thanks for the offer but I went ahead and am doing a LS swap currently.
*I removed my efi because I didnt follow Holleys diagnostic steps*
RTFM
Your comment is just as *worthless* as your sarcasm!
This vid is over a year old, some of the early kits had issues...
Wrong. I have a new kit. Can you say JUNK? Holley had the nerve to tell me its the inviroment. Never new iowa weather and a heated garage could cause such problems
90 % of the issues are poor installs . Devils In the details. Proper power and ground connections are key as are EMI and other interference issues. No brainer over a carb.