I HATE FOG LIGHTS!
Join Date: Sep 2007
Location: United Kingdom
County: West Yorkshire
Re: Revs fluctuate to 2500-3500rpm when Idle..WHAT THE???
Could be a lose conection on the air flow meter. Have you had the engine looked at lately. It may have been knocked. Check that mate, it could be as simple as that! Could be the idle control valve, I would get it checked as these parts do not come cheap.
If the engine management light is coming on then it would point to something along those lines.