When I slow down and stop the car engine shuts off?
Malfunctioning or Clogged Air Control System So if your car shuts off when stopped or slowing down, the chances are that the valve might be malfunctioning or clogged. When excessive carbon builds up in this particular region, it prevents sufficient air from passing through into the vehicle’s engine.
Can a dirty MAF sensor cause rough idle?
A rough idle can be caused by the mass airflow sensor. The most common fault is a dirty sensor. A malfunctioning MAF sensor will cause the computer to have a trouble code.
What does it mean when RPM goes up and down?
Hi There, It sounds like you may have a dirty or failing idle air control valve causing your engine idle to fluctuate. When this happens, the job of the idle air control valve is to bring this deceleration down to a slow and smooth idle rather than suddenly cutting off the fuel supply causing the motor to die.
Why does my Jetta idle go up and down?
When the engine RPM drops below the normal range of 750-800 RPM (for most cars), this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. Since your car is idling up and down, this may suggest that it may be receiving incorrect voltage causing it to fluctuate erratically.
Why does my RPM go up and down while in park?
If the engine can’t keep idling, it will continue trying to get it revved up to compensate. The cause of the erratic engine you’re experiencing could be a vacuum leak, sensor failure, or an EGR system malfunction.
What should your rpm be in park?
In most of today’s cars, an idle speed of 600 to 1000 RPMs is average. If your car is idling rough, though, it won’t feel smooth. The RPMs will jump up and down, for example, or they’ll fall below 600 RPM (or whatever is typical for your vehicle).
What are the symptoms of a vacuum leak?
You hear a squealing or sucking sound from the engine: A vacuum leak can sound just like the end of the tube on your home vacuum cleaner. If you hear a sucking noise from under your hood, you likely have a vacuum leak. Get it diagnosed by a professional.
Is it bad to drive with a bad IAC valve?
Can You Continue Driving with a Bad Idle Air Control Valve? Technically, you may be able to drive with a bad IAC—but you should not continue doing so. A bad IAC can potentially lead to stalling, which can compromise vehicle safety.
Should I clean or replace IAC valve?
sometimes the IAC idle air control valve gets clogged up with carbon build up and its passage way can too, if you plan too “clean the valve.” it is also advisable that you clean the throttle body and the passage for the idle air control, depending on how hard it is too clean the throttle body that is, a can of approved …