HELP Needed-C4 - ENGINE
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
HELP Needed-C4 - ENGINE : FIXED 4pm
Guys, Need some help here. (87/L98/Stock)
She starts right up, runs high idle, then slowly chokes out and dies. You can give her gas, and she will continue to run, with constant gas, but leave off the throttle and she chokes out and dies.
Pressure : 43psi @ rails and holds for 1hr+
Startup: Fires right up, no hesitation on startup
Battery: 12.2v costant
Codes: No error codes and no codes during scan while running.
Vacume Lines: all lines check and connected, no leaks, did leak testing
Any help would be appreciated.
thanks
vinnies87
She starts right up, runs high idle, then slowly chokes out and dies. You can give her gas, and she will continue to run, with constant gas, but leave off the throttle and she chokes out and dies.
Pressure : 43psi @ rails and holds for 1hr+
Startup: Fires right up, no hesitation on startup
Battery: 12.2v costant
Codes: No error codes and no codes during scan while running.
Vacume Lines: all lines check and connected, no leaks, did leak testing
Any help would be appreciated.
thanks
vinnies87
Last edited by vinnies87; Jul 16, 2006 at 11:23 PM.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Originally Posted by Fast Cop
The first thing I would check is the in line fuel filter and then work from their.
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
On the 86 I used to have the cat plugged up and caused the same problem. I have heard that you can check for a plugged cat with a temp/pyro gun. It the temp of the pipe coming out of the cat is much less than the temp of the pipe in front of the cat then you have found the problem.
Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Originally Posted by 86Pacecar
Check your IAC, sounds like it's not functioning.
Burning Brakes
Joined: Apr 2005
Posts: 784
Likes: 0
Sorry to hear you're having problems, Vinnie.
I had a very similar experience with my 90 and it turned out all three cats were plugged up.
Do the pyrometer check that's been suggested. It should tell you a lot about what you're up against.
Good luck.
I had a very similar experience with my 90 and it turned out all three cats were plugged up.
Do the pyrometer check that's been suggested. It should tell you a lot about what you're up against.
Good luck.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Originally Posted by corvetteronw
On the 86 I used to have the cat plugged up and caused the same problem. I have heard that you can check for a plugged cat with a temp/pyro gun. It the temp of the pipe coming out of the cat is much less than the temp of the pipe in front of the cat then you have found the problem.
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Thread Starter
Le Mans Master
Joined: Aug 2003
Posts: 9,884
Likes: 3
From: Magnolia Mississippi
St. Jude '03-'04-'05-'06-'07
Posted update in Tech section, Turned out to be : Ready:
Something in the ECM got stuck: Removed ECM, replaced with backup good ECM and Stock Chip, Installed and she fired up, ran kinda ruff, Removed and replaced with current ECM and PCM Chip, Installed and she fired right up again. Then Did the complete reset of : IAC, Timing, TPS and buttoned her up... No issues. Gonna put this on the Check List.
Something in the ECM got stuck: Removed ECM, replaced with backup good ECM and Stock Chip, Installed and she fired up, ran kinda ruff, Removed and replaced with current ECM and PCM Chip, Installed and she fired right up again. Then Did the complete reset of : IAC, Timing, TPS and buttoned her up... No issues. Gonna put this on the Check List.