Join Date: Apr 2007
Location: Hertfordshire / Essex
Re: idle again
i think the throttle actuator opens the throttle a set amount that is required to keep idle at the specified rpm, and i think the computer uses the data from the maf so it knows how much to command the throttle actuator to open. it might be either the maf ( common, but usually its misfires when it goes bad) or the throttle actuator. Alsi it might be that there is a leak in the intake after the throttle actuator, thus more air going to the engine than the maf measures.
i d check the intake for any loose or cracked hoses or pipesthat connect to it, then try with a known good maf, then the throttle actuator. but before that its worth resetting the computer