Erratic idle, need help

**RAudi Driver** · 12-13-2008 08:06 PM

Alright, doing this for a buddy who just got his car chipped (Revo) and tossed in a Forge Dv. He is now experiencing an erratic idle. It jumps up and down and although it's not all the time it's happening. Oh, car also threw check engine light and the code was for ? . I can't remember.

He is coming over tomorrow so I can read the code which was cleared and came back.

Does anyone have any insight in the meantime? I searched and came up with nothing. I will be sure to post the problem once I find out.

Is the car just learning the new program? It ran fince the first few days after the work was done. do you guys think that he could have shot out an 02 sensor?

**krueges3a4** · 12-13-2008 10:01 PM

i had this happen, sold the chip. i later found out this could be causes by vac leaks. hope that helps, i guess something to check.

**Nico** · 12-13-2008 10:47 PM

I doubt the tune is to blame for this problem, its more likely related to the forge valve, there have been several threads where people have had problems with this part. most of the time it is due to the installation of the valve not due to a faulty valve.

The idle could also be affected by a faulty PCV.

**ElCapitan464** · 12-13-2008 11:06 PM

samething is happening to me, i turned my chip off, still have the problem, took it in and they replaced the pcv still have the problem, so idk it goes in the shop for a week, its probably like the idle control thats what im thinking now