Forum Replies Created
-
Replies
-
Well … no feedback from the forum.
In case anyone encounters this problem, I believe my after market IAC valve is sticking open when cold. After a cold engine start and then running for 15 minutes, engine temp is 185+ degrees, and still idleing at about 2,500 RPM. I shut the car down and restart it, and then it runs awesome.
I ordered another brand of after market IAC and will return the original and see if that helps.I got some throttle body cleaner last night and cleaned the throttle body plate. I ended it taking it off the car along with the Idle Air Control Valve and both were pretty dirty. The screen on the IAC was about 1/2 carboned up so no air, or very little would pass. Cleaned it all up the best I could with the cleaner and a handful of rags. Started it and, it seems to start better but now is idling around 500 RPM or so. If I turn on the AC it seems to almost kill the motor at idle. I only ran it for a minute or two last night in the garage, will be driving it today.
How do I go about checking the IAC valve? I tinkered with a bit and was trying to figure out if its stuck or is sliding freely, I didn’t want to break anything so I was fairly gentle and got a new IAC ordered last night.Thank you for the pointers nightflyer!
To answer your questions:
Throttle body being dirty, I have wondered this, what portion would I need to disassemble and clean? The portion that has the throttle plate/butterfly or the entire intake manifold assembly? and no, I have not taken either one of these parts apart to clean.
MAP sensor – I have tested this fairly thoroughly and it tests very close to what it should be. I didn’t think these are very common failure items and it tests very close to specifications.
TPS sensor – I have tested this thoroughly using the ODB2 scanner and an ohm meter while pushing the throttle and found it tests perfectly within specifications.
The IAC – I have not tested this and don’t fully understand how it works or how to test it, thanks for the suggestion, I will look more into this.
I have checked for vacuum leaks pretty thoroughly, I got a smoke generator with mineral oil I used and tested every host on the intake manifold and did not find any leaks. I again tested this with a small handheld vacuum pump and confirmed everything looks good.
Thanks for the information, I really appreciate it.