Hey guys. I’ve got a bit of a problem with my Camaro that’s somewhat intermitent. It’s most noticable on cold starts after sitting over night. The car wants to run very low RPM and generally stalls. If I give her some throttlw she’ll stay running and once I let go depending on how long I’ve kept throttle on it’ll generally level out, I also noticed alot of times if I just give it a little slip of throttle at the pedal and release, most of the time it doesn’t want to compensate because the RPMS will drop and alot of time it will stall again. Sometimes it catches itself, sometimes it won’t. Generallyt it seems to get better once it’s warmed up a bit but earlier it seemed like the idle wanted to bounce a bit and occasionally it would again stall out.
-We recently replaced spark plugs and wires for a tune up
-The MAP, IAC and TPS sensors were replaced last year.
-I checked the coolant temp sensor for the computer, the resistance seemed to be reading normally.
- We recently also cleaned the points for the distributor cap since there was some corrosion.
I tested Fuel Pressure on the test port on the rail and pretty instantly got 40 PSI of fuel pressure. I ran the car with the tester and it never really dropped below 35 PSI.
- I let the car off for a few minutes with the tester hooked up and the pressure remained constant. I’m thinking my injectors aren’t leaking with that, although it’s possible that one or more may not work properly.
There are no Check Engine lights on at any point when this happens. I did put it in diagnostic mode to check for codes as well and got nothing.
Some other potential candidates that I can think off the top of my head
-Mechanical timing advance is off
-compression related problems
-fuel injector(s) not working.
If anyone has any other thoughts based on the symptoms or past experience of what to look for, please let me know.
Edit: I forgot to mention she does smell like she’s running fairly rich. I think the best analogy would be it smells like good ol bumper boats