Idling issue

[FreedS4]

With intake leaks ruled out now you have to consider other possibilities. A fuel system pressure check should be run and you need to check to see if the AFM vane is sticking. If the O2 sensor has 100k on it, replace it. Another possibility is a bad DME engine temp sensor. You also need to check (electrically) the operation and adjustment of the TPS.

Thanks Jim, I've got a lot of testing to do this weekend.

[jlevie]

With intake leaks ruled out now you have to consider other possibilities. A fuel system pressure check should be run and you need to check to see if the AFM vane is sticking. If the O2 sensor has 100k on it, replace it. Another possibility is a bad DME engine temp sensor. You also need to check (electrically) the operation and adjustment of the TPS.

[FreedS4]

On start up, it's acting like it wants to die even more now and hovers around 500RPM until it gets nice and warm. Ran a smoke test today, no leaks. ICV has been cleaned and appears to be working. Any other thoughts?

[FreedS4]

I'll give it a try, thanks.

Chris

[jlevie]

Remove the ICV and use carb cleaner on it until the vane moves freely.

[FreedS4]

That sounds like a sticky ICV, probably aggravated by intake leaks.

What's the fix for a sticky ICV? I checked the resistance acrosst the terminal and the ICV itself tests good.

[jlevie]

That sounds like a sticky ICV, probably aggravated by intake leaks.

[FreedS4]

I've developed an idle issue over the course of the past week. On start up the car jumps up to 1250RPM or so, then drops back to 500RPM and sometimes acts like it is going to die, but then jumps right back to 750ishRPM. Then it idles relatively smoothly. When I'm driving it around and push in the clutch, the idle drops down again to 500RPM and then climbs back up to 750ishRPM. Also, the car seems a little jerky if I'm in gear and barely giving it any gas. Another point of note is that it seems to get better, meaning not as much of an RPM drop when I let off the gas in neutral to almost no drop at all, when the car warms up. Any ideas? Thanks in advance.

Chris