600-1200 the computer will vary it.
900-1200
Idle speed is not adjustable. The computer controls the speed with the idle air control motor on the back of the throttle body.
It has an IAC ( idle air control ) motor on the throttle body.
try your egr valve
Having the speedometer jump and the engine stall in the 1994 Jeep Grand Cherokee Laredo could be a problem with the idle and the transmission. The transmission slipping can cause the speedometer to jump.
The idle speed is computer controlled. If the idle is too low, there is a problem with a ssensor or the idle speed motor.
Idle air control valve found on Tue backside of throttle body.
It can be stuck in 4 wheel drive or the idle control system needs attention.
Inoperative radiator fan.
most common cause, a vacuum leak.
maybe you need a new head gasket?