my car wont idle after the heads n cam
08-02-2009 | 11:06 PM
#1
Thread Starter
Junior Member
Joined: Sep 2004
Posts: 1
Likes: 0
Car: 1988 trans am gta
Engine: l98
Transmission: 700r4
my car wont idle after the heads n cam
I put a set of heads with the 202 and 16 valves and XFI" 292 Hydraulic Roller Camshaft
GM 305-350ci 1987-98
Lift: .584"/.579" w/1.6 Rockers
Duration: 292°/300°
RPM Range: 2200-6200
It has the stock tpi intake and stock computer i have a set of hooker shorty headers will this setup work and what should i check
GM 305-350ci 1987-98
Lift: .584"/.579" w/1.6 Rockers
Duration: 292°/300°
RPM Range: 2200-6200
It has the stock tpi intake and stock computer i have a set of hooker shorty headers will this setup work and what should i check
08-03-2009 | 10:55 AM
#2
Senior Member
Joined: May 2002
Posts: 845
Likes: 0
From: Northern California, Redding
Car: Red 1987 IROC Convertible
Engine: 305 LB9 TPI
Transmission: T5 5-Speed
Axle/Gears: 9-Bolt 3.45
Re: my car wont idle after the heads n cam
That's too much cam for a TPI. Too much duration. I'm not surprised that it won't idle. You're going to have a tough time ever getting that to run well.
I suggest installing a different cam.
I suggest installing a different cam.
08-03-2009 | 04:54 PM
#3
Moderator
Joined: Jul 2001
Posts: 5,196
Likes: 59
From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Re: my car wont idle after the heads n cam
Does it idle extremely low? When I finished my H/C/I swap, it would idle low, but ok with open headers. Once I attached the full exhaust it would idle super low and stall when put in gear.
My IAC was completely maxed out at idle. So I adjusted the TB screw and got my IAC counts at 80 at idle, and it idles perfect.
[Edit] I do agree about the cam though.
My IAC was completely maxed out at idle. So I adjusted the TB screw and got my IAC counts at 80 at idle, and it idles perfect.
[Edit] I do agree about the cam though.
Last edited by IROCThe5.7L; 08-03-2009 at 05:02 PM.
08-03-2009 | 04:56 PM
#4
Joined: Sep 2003
Posts: 25,779
Likes: 376
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: Strange 12 bolt 3.42
Re: my car wont idle after the heads n cam
Too big of a cam period. Does the heads even handle that lift? what heads are on it and any work done? If not, then you have a mess of problems. Tear it all down and start over again
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