I've noticed recently that when out and about in the car and I come to a stop the car sometimes idles between 500 - 1000 and back again, almost bouncing up and down. I've only noticed this recently on short trips to the shops and back.

Could this be a dirty idle control valve

The car has been sat on a ramp for roughly 2 months, I've heard this can cause dodgy idle problems if not being used for extended periods of time.

Or could this be as simple as not getting warm enough in the short time im in it? I live in a residential area where I can't really sit there warming it up sadly without the curtains starting to twitch However I do try and drive off boost for a least 5-10 minutes until I feel it's warm enough.

Relavent Mods, VF34, full decat, 550 injectors, walbro, APS air feed, STI TMIC, simtek.

Cheers

 

mine does the same untill it heats up give ideal con valve a clean with wd forty.