Hey all,

The car has been acting up the last few days. It sat for over a week due to the ice storm but the wife uses it as a daily and it went back into duty on Monday. She mentioned that the last few days on cold starts it is idling at 2000ish rpms and eventually settling at normal 700ish. Today the Check Engine light came on with a p0507, too high of an idle code. My first thoughts is a small vacuum leak somewhere that is sealing itself when it gets warm. The car doesn't do it on warm starts. Next though is PCV. Before I take it somewhere to get it smoke checked, I wanted to see if anyone else has any ideas for me. Thanks!

 

I just had this happen. PCM needs to be reflashed. This happened to me on cold or hot starts. The idle would fluctuate high and low before settling down. I'll put in the details from the RO later tonight.

 

Think I read somewhere that it might be related to water (or something else) obscuring an o2 sensor reading.

Is there any loss of performance after the car settled down?

Also, what model/mods?

 

No mods and no performance loss. Car drives like normal. Settles down fairly fast, like a normal cold start but instead of 1300ish rpms before it drops to 700, it idles at 2000+ rpms and settles at 700