this is driving me crazy.help
this is driving me crazy.help i go to crank my car and it take's a few tries,back fire's and make's weird noises.i had it dyno tunes twice bye geof at thunder and he cant figure it out.i changed plugs,tb,mass air meter and pulled my IAC sensor out and cleaned it.fuel pressure is fine.it mostly happens on warm startup's.
think it might be my injector's or fuelpump?
think it might be my injector's or fuelpump?
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
if you can get a mechanical fuel pressure gauge, hook it up to the fuel rails and that'll tell you if it's your fuel pump.
Possible it could be the fuel filter too (how many miles since you last changed?)
When I swapped PCMs a while back I had to do a CASE learn on the car, until I did that I was setting a Cam position code, and it really didn't want to start on me (since the PCM was just guessing when the time was right for fuel and spark)
Possible it could be the fuel filter too (how many miles since you last changed?)
When I swapped PCMs a while back I had to do a CASE learn on the car, until I did that I was setting a Cam position code, and it really didn't want to start on me (since the PCM was just guessing when the time was right for fuel and spark)
Originally Posted by ProjectDuStU
my car was doing that as well, turned out i had a cracked head gasket very small but it made it not want to start... if all else fails i would check that out
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo any new idea's?
fuel pressure is fine.i changed the filter.i do notice if i turn the key on and let it sit for about 15-20 seconds it seems to fire easier.sometimes on the first try.
no code's.everything looks fine thru my buddies matco code scanner.
every time it does it i want to
fuel pressure is fine.i changed the filter.i do notice if i turn the key on and let it sit for about 15-20 seconds it seems to fire easier.sometimes on the first try.
no code's.everything looks fine thru my buddies matco code scanner.
every time it does it i want to
i used a external fuelpressure guage a few month's ago and tested it every way.im not 100% sure,but i think it was 40psi key off and 60psi running.it never droped down further than 40 with the key on and motor not running either.
im still not rulling it out.
i'm gonna look at the crank position sensor next.
im still not rulling it out.
i'm gonna look at the crank position sensor next.