Skip the auto shop - Our mechanics make house calls

Q: Car idling high in park

asked by on

At first my car idled high, at around 1,500 RPMs, while in Park or Neutral. Now, the car starts, but then stalls immediately. Could it be the throttle body, EGR valve, or even a vacuum leak?

A: At such a high idle speed, a large vacuum l...

At such a high idle speed, a large vacuum leak would be possible if the engine didn’t return to a normal level after warming up. The idle air control valve regulates engine speed when the throttle plate is closed, allowing air to maintain idle speed. A blockage, or malfunction here can cause your concern. Have a technician, such as one from YourMechanic, run a diagnostic on your engine’s high idle speed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: 4x4

Hi there. When you engage the four wheel drive, a corresponding light is illuminated on the dash. Vehicles with multiple gear ranges will also indicate what range has been selected. However, it shouldn't illuminate inconsistent as you've described above. In...

Q: Is loud screeching when pressing down the brakes normal for a Nissan?

Hi and thank you for contacting YourMechanic. A screeching sound coming from your brake can be normal. This is cause by brake dust. A paste can be applied to the brake pad to quiet this sound, but may not completely...

Q: What's wrong with my gas pedal?

Hello. This may be related to what is called a throttle position sensor. This is a small sensor inside the intake system of your car that monitors the position of your foot on the gas pedal and relays this information...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.