900-1200
600-1200 the computer will vary it.
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.
most common cause, a vacuum leak.
Inoperative radiator fan.
maybe you need a new head gasket?