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Thread: popping/cutting out

Started 1 month, 3 weeks ago by wes1124
my 86 t just wont run right. the last time i was at the track during my burnout it started popping and cutting out. i left the line at 2# and it pulled strong until it got up in the rpms at wot, popping and cutting out. let out and get back in same thing all the way down the track.times were as follows: 60' 1.75, 1/8 7.71@90mph, 1/4 12.04@113mph. fuel pressure was set at 40# with vaccum line off...
Site: www.turbobuick.com  www.turbobuick.com - site profile
Forum: General Turbo Buick Tech   General Turbo Buick Tech   - forum profile
Total authors: 11 authors
Total thread posts: 28 posts
Thread activity: no new posts during last week
Domain info for: turbobuick.com

Other posts in this thread:

DailyDrifter replied 1 month, 3 weeks ago
How olds the fuel pump, and is it a defective Walbro? Has the fuel filter been changed? Is it popping out the intake? What o2's are you seeing when the problem occurs? I would also bump the fuel psi up 2-3 more lbs.

wes1124 replied 1 month, 3 weeks ago
not sure about the pump it was in there when i got the car. fuel filter is new. it actually sounds like its cutting out through the exhaust. what should the fuel pressure be at wot?

DailyDrifter replied 1 month, 3 weeks ago
If its coming out the exhaust its rich. What are your plugs gapped at? Fuel psi should raise 1:1 so if you are running 15psi with a baseline of 40lbs you should end up with 55lbs of fuel at WOT.

QUIP'6' replied 1 month, 3 weeks ago
subscribed!!!! same problem here been trying for 7 months to solve

DailyDrifter replied 1 month, 3 weeks ago
After you run the car ohm out the coil pack. It could be weak.

wes1124 replied 1 month, 3 weeks ago
1

wes1124 replied 1 month, 3 weeks ago
plugs are gapped at .035 and are new, tried coil pack and module from my buddy's car and no change. its killing me. if it is the fuel pump what would be the best set up to go with?

TurboBuRick replied 1 month, 3 weeks ago
Try swapping the cam sensor cap from your buddies car. If that does not help, replace your crank sensor with a new ac delco one. Make sure you set it up right. Rotate the crank and check clearance on all three blades that pass through making sure the wheel is not bent. GL

TurboBuRick replied 1 month, 3 weeks ago
Try swapping the cam sensor cap from your buddies car. If that does not help, replace your crank sensor with a new ac delco one. Make sure you set it up right. Rotate the crank and check clearance on all three blades that pass through the sensor. Make sure the wheel is not bent. GL

darkred87T replied 1 month, 3 weeks ago
I have the same problem. I swapped coil pack/module (with another old one), bought a new cam sensor cap, swapped injectors, plugs, and monitored FP. My plugs look normal; maybe a little lean. FP is steady. Have you tried replacing the plugs? Also, it is not only WOT. It also happens under part throttle. It has a stumble at idle. Sound familiar? Keep us posted. Thanks, Mike

 

Top contributing authors

Name
Posts
wes1124
6
user's latest post:
popping/cutting out
Published (2009-11-03 16:44:00)
that would be great, im running stock cam and lifters so whatever would go good with that!!
darkred87T
4
user's latest post:
popping/cutting out
Published (2009-11-04 19:44:00)
Quote: Originally Posted by TurboBuRick Caspers cam sensor? Thats been you problem all along. Those things are natorious for this kind of thing. I'm definitley going to consider it. I hope I can dig up the old one. However, I I bought the Caspers cap when it started cutting out thinking that might be the problem.
DailyDrifter
3
user's latest post:
popping/cutting out
Published (2009-11-01 22:19:00)
After you run the car ohm out the coil pack. It could be weak.
j-6
3
user's latest post:
popping/cutting out
Published (2009-11-03 17:10:00)
since you're running a stock set-up the comp 980's should do the trick
follow_me_22
3
user's latest post:
popping/cutting out
Published (2009-11-03 20:47:00)
Quote: Originally Posted by lcowart Its amazing what you can find if you look for it. I was just getting ready to start a thread with EXACTLY the same problems when I found this. I have talked to eric at TT and he said my blms were a little high and it could be a vacuum leak or a bad maf. Mine didnt do it all the time but mainly at partial throttle. You could give it the gas and it would straighten right up and take off. Could the car...
TurboBuRick
3
user's latest post:
popping/cutting out
Published (2009-11-04 17:14:00)
Quote: Originally Posted by darkred87T Cam sensor is a new Caspers...... Mike Caspers cam sensor? Thats been you problem all along. Those things are natorious for this kind of thing.
QUIP'6'
2
user's latest post:
popping/cutting out
Published (2009-11-02 20:22:00)
Quote: Originally Posted by j-6 I had the same problem about two months ago at first I thought it was the coil pack also,so I replaced it but it still was cutting out or busting up on top so after talking to several GN experts we found out it was a weak valve spring if youre running those comp bee-hive springs that may be the problem I changed springs and its not busting up no more. this is what i am down to bieng my problem!!!! last thing on...
that national
1
user's latest post:
popping/cutting out
Published (2009-11-02 11:54:00)
try checking all of your grounds. its worth a try
MCH86GN
1
user's latest post:
popping/cutting out
Published (2009-11-02 10:19:00)
Quote: Originally Posted by darkred87T I have the same problem. I swapped coil pack/module (with another old one), bought a new cam sensor cap, swapped injectors, plugs, and monitored FP. My plugs look normal; maybe a little lean. FP is steady. Have you tried replacing the plugs? Also, it is not only WOT. It also happens under part throttle. It has a stumble at idle. Sound familiar? Keep us posted. Thanks, Mike I subscribe! My only seems to...
lcowart
1
user's latest post:
popping/cutting out
Published (2009-11-03 19:53:00)
Its amazing what you can find if you look for it. I was just getting ready to start a thread with EXACTLY the same problems when I found this. I have talked to eric at TT and he said my blms were a little high and it could be a vacuum leak or a bad maf. Mine didnt do it all the time but mainly at partial throttle. You could give it the gas and it would straighten right up and take off. Could the car sputtering also cause detonation? I am...

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