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An icv is an idle control valve. It controls the idle of the car (without the accelerator pedal depressed).
Let it idle for over one minute in Park without a/c on. Let it idle for over one minute in Drive with brake pedal depressed. Let it idle for over one minute in Drive with brakes pedal depressed and a/c on.
An idle cylinder refers to the state when the engine is not coupled with the drivetrain and with throttle pedal not depressed. There is rotational speed but it is not enough to move the vehicle.
ckeck for vac. leak at brake booster
The Idle may be set to low, The Idle switch may be broke, or your power braking could be messed up go to a good macanic they will know.
idle control sencor
have ur idle control motor checked if sounds like its not functioning its (aka) ICM
Engine vacuum leak.
because all vehicles have an idle. Without an idle your car would not stay running.
check your air idle control valve
The A/C idle compensator solenoid is not functioning. This should be located next to the carb.
check the IACV (idle air control valve) or the TPS (throttle position sensor), you may have the wrong one, that is what happened to mine