Hi I have a ap2 2004, during warm up I hear my air pump for about 30-40 seconds when it turns off, my idle drops about 200-600 rpms right away, is this normal, almost sounds like an a/c compressor is coming on, and engine idle comes down.

 

anybody

 

I've no idea, but the first thing I'd do is to do a map whack.

Also, did this happen when the temperature changed? Did you replace anything? Modifications?

 

No totally stock, it sounds normal to tell u the truth.

 

Sounds kinda normal... any other symptoms like shuttering?

 

No no shuttering,, just sounds like a power drain when pump turns off, interior lights also dim a little.