this just started, but when i come to a stop the car will idle at like 1500 or so and stay there, then drop to the normal 900 or so. what would cause this? should i be worried?

 

Is it varying back and forth from the two or is it correcting itself after being at a stop for a bit?

 

it corrects itself most of the time...sometimes if i rev it it goes back down to normal idle.

 

Car wouldnt happen to be tuned or anything would it... or is it just stock. Idle air control valve is supposed to keep your idle from fluctuating like that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ForceFed_Motorsports &raquo;</TD></TR><TR><TD CLASS="quote">Car wouldnt happen to be tuned or anything would it... or is it just stock. Idle air control valve is supposed to keep your idle from fluctuating like that.</TD></TR></TABLE>

its a LS/VTEC with very minor work done...headers, intake, etc.....

 

High/varying idle is often a vacuum problem... double check and make sure you dont have a small vacuum leak.

 

Yeah, it's probably a vacuum leak or other vacuum problem, or your IACV (Idle Air Control Valve) is dirty, there's a post in here showing how to clean it.

 

You didn't by chance swap the trans at the same time as the lsv, did you? Because I had that problem on my turbo lsv going from auto to manual at the same time, and it was because that needs an iacv swap for the manual trans..