when I turn on A/C on my 8 , RPM goes low. and cause a little virbrate, and then the RPM goes back up again anyone has this problem?


any advise?

I dont know if i have ever experienced this in my 8, but my Celica did the exact same thing

Perfectly normal. The A/C compressor puts a load on the engine when it kicks on, and that causing the change in the idle RPM.

When the AC is turned on, you are basically connecting the engine to the AC compressor, putting a load on the engine. The engine then has to compensate, but opening up the throttle a little, so it won't stall and go back to normal idle RPM.