idle fluctuates with a/c swicthed on..???

[falak sher]

hey guys i recently got my ac fixed and noticed that when ever i swicth the ac on my car starts to idle rough. otherwise without the ac switched on the car is perfect.. the rpm drops to zero and then goes up and then down its quite irritating.. please can anyone tell me if thrs something wrong with my compressor wiring or if thrs something wrong with my icv or any other thing.

reply needed asap please..

thanks

[Big Evil]

The Ac compressor will cycle on and off based on pressures in the ac system. If its doing it rapidly whoever "fixed" it actually f'ed it up. BUT I'll need a little more info. Was it converted from R12? What was wrong with it that required it to be fixed in the first place? How was it fixed? When the ac compressor engages it should send a signal to the PCM to raise the idle to compensate for the increased load on the engine, if it dosen't the engine bogs, the computer freaks and turns stuff (like the ac compressor) off until the idle comes back up. If the charge or pressure in the ac system is wrong, like an improper fix or fill, the compressor will cycle rapidly, also freaking out the computer.

[falak sher]

yo bro thanks for the post man. i found out the problem basically the guy had messed up the wiring a bit. so i got it checked by my other mechanic and he fixed the problem.the wiring was wrong. the wire to rasie the idle was not connected. thanks bro