running rich
Thread Starter
Junior Member
Joined: Mar 2006
Posts: 84
Likes: 0
From: west palm beach fl
Car: 1989 IROC
Engine: L98
Transmission: 700R4
Axle/Gears: BORG WARNER /3:70
running rich
I just put a new cam in. The car runs fine but is running really fat. I dropped the fuel pressure to 46 psi it helped a little but is still fat. There is no check engine light. The cam is a .510 lift so I don't want to drop the fuel pressure any more.
Senior Member
Joined: Mar 2008
Posts: 428
Likes: 0
From: nj
Car: 89 iroc
Engine: l98
Transmission: tremec
Re: running rich
why are you running 46psi anyway.. what size injector do you have. is your ecm reprogrammed for the new injector. how much hp do you think you have. how do you know its fat.. did you do a scan.. post the results. is timing on?
Supreme Member
Joined: Jan 2003
Posts: 1,323
Likes: 0
From: Arthur, Ontario, Canada
Car: 92Z28, 99SS, 83Z28 & 86GTA
Engine: 421, LS1, 327Turbo & 383
Transmission: T-56, 4L60E, T5 & 4L60
Axle/Gears: 4:10, 3:42, 2:73 & 3:27
Re: running rich
Its probably just the over lap of the bigger cam, get it properly tuned
Thread Starter
Junior Member
Joined: Mar 2006
Posts: 84
Likes: 0
From: west palm beach fl
Car: 1989 IROC
Engine: L98
Transmission: 700R4
Axle/Gears: BORG WARNER /3:70
Re: running rich
The injectors are stock. I had the fuel pressure at 49 psi and the motor ran fine but was fat. I dropped it to 46 psi and the exhaust cleaned up a little. The timing is at 38. Thats were the car wants to run right. I have to put a brake booster in it this nexr week so next weekend I can go and get it tuned.
Thread
Thread Starter
Forum
Replies
Last Post
