Last post on Jan 23, 2010 at 8:59 AM
You are in the Saturn S-Series
What is this discussion about?
Saturn S-Series, Engine, Sedan
#80 of 81 Engine idle
Jan 23, 2010 (8:16 am)
I'm not very good at vehicle repair and no very little. I have a 2001 Saturn S-Series car. I noticed the last few weeks when (clutch) I put the vehicle in neutral it revs up between 2 to 3 RPM. Vehicle sounds very loud. When I go into first gear it works just fine, the RPM drops to about 1 or a little less. I get NO error on my dash and I have ALWAYS replaced my air filter. Any help would be greatly appreciated.
#81 of 81 Re: Engine idle [staadon]
Jan 23, 2010 (8:59 am)
Revving up to 2000 to 3000 RPM is way high. The Saturn's idle air control (IAC) may be suspicious, but I have my doubts. IAC opens during cold idle and opens a bit also during air conditioner operation to speed up the idle in varying amounts to stablize cold idle and handle A/C load. I have never seen it manage to get above 2,000 RPM even when my '02 SL1 operates the exhaust electric blower which I determined operates at cold start and the IAC is most wide open (about 1,700 RPM). SL's OBD-II is quite accurate and would have detected other issues that I could think of. An air leak like other threads here relate to common problem of intake air leak would cause unmistakable startup problems and lots of misfires that would easily trigger the P03XX code. As the IAC is not cheap to buy new one on hope that is problem, best to retrieve it and use carb cleaner to dissolve the mess and re-install.