Originally Posted by bobs
What you are hearing is the air injection system. So sayeth the Big Book of Crossfire page 25-31:
This vehicle is equipped with an air pump that injects air into the exhaust to reduce the emissions during engine warmup.
.
i think mine comes on randomly while i drive.... as in i'll drive for a half hour and pull up at a red light, i'll hear the fan (pump noise) come on and my headlight dim... i'm guessing its not normal????