okay when i have my lights on, and i press on the brakes at a stop light my idle goes from 1000 down to 500 and it shakes my car badly, almost like its going to just die on me, i let off the brakes.. it goes right back up to 1000. help me figure this out, i've tried messing around with the idle a bit, now i have it at regular 1100 rpm and it still drops down to about 600 and vibrates the shit out of my car. so please help me.

 

Thats pretty odd. Your EACV is what controls your idle and your car from stalling out. I would check that. Also make sure your vacuum hoses are in good shape. The brake booster afterall is vacuum powered so you might be taking away too much vacuum when you press the pedal down.

 

i'll check on that, thanks a lot!