1994 mitsubishi Galant LS

My Galant has an idle surge from 1000 rpm to 2000rpm back to 1000rpm and so on. I know it is a sensor, but i am not sure. Please help?

unhook the MAF (mass air flow sensor)running,post back what happend.



codes ?(any communication with ECU?

play with any of the SAS SCREWS ON THE THROTTLE BODY?

Vacuum leak, improper timing belt installation if this has been done lately, improper ignition timing (due to a faulty “tune-up” or faulty T-belt installation, faulty Idle Air Valve, etc. are possibilities.