On idle the AC compressor turns on and the rpms drop, when they drop below 500RPMS the whole car starts to shake, it sounds almost as if the car is going to shut off. How can i fix this??????

 

my car does a similar thing, i would like to know too

 

lose the ac

 

Your IAC should open up to compensate for load so it might be clogged so try cleaning it . If you have a chipped ecu , some of them disable the IAC . Usually thats the culprit .

 

Mine does that occasionally also, it happened after i put my 4-1 header on... I would check the IAC like Highrevs99 said

 

which is the IAC?? is it somewhere on the intake manifold or the throttle body?? how do i clean this valve, where do i spray it?? also the IAC is not the same as the fast idle valve because I have already replaced the fast idle valve because my idle used to go up and down, up and down from 2000 RPMS to 800 RPMS till i got it replaced.

 

anyone?

 

iacv is the thing that bolts 27 and 28 go thru.

 

how do you clean this???

 

how do you clean this thing??

 

!bump!
comon, someone has to know this??

 

take it out and look at it. it will be obvious. there is a screen that might have crud on it.

 

your idle air control valve can get carbon build up so heavy that can make it harder to move the piston inside it. your fix is to remove the iacv and spray throttle body cleaner in the ports on it. spray it one time and let it sit for 10-20 mins then spray again and let sit for the same ammount of time then while you are doing that you might as well clean the tb then when starting the car you will have to rev it a little bit to get the tb cleaner out off the combustion chamber and off the plugs then it will start and blow some carbon deposits out. you should be good after that.