Skip the auto shop - Our mechanics make house calls

Q: Goes from 1500 to 3000 rpms randomly

asked by on

The rpms go from 1500 to 3000 randomly in gear and in neutral and the transmission fluid is overfull

My car has 246000 miles.
My car has an automatic transmission.

A: Hello there, a few different components can...

Hello there, a few different components can cause the vehicle to have a fluctuating idle. The most common would be the MAF sensor, a vacuum leak, exhaust leak, oxygen sensor or the idle air control valve. A qualified technician, such as one from YourMechanic, will be able to diagnose your high idle and perform any repairs required.

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・Save up to 30%

Get a quote

What others are asking

Q: AC compressor.

The clutch assembly to your A/C compressor commonly fails. If the compressor on the left front side of the engine has a rust color, then it is likely it needs a clutch kit with shims. Diagnosis of your A/C should...

Q: Drove car through deep puddle and now it makes a loud noise when accelerating

How is the car driving other than the noise? If it's running poorly, this could be a very serious problem and you should have it checked as soon as possible. Sometimes when driving though big puddles, water can get sucked...

Q: I think my alternator needs to be replaced

Hi there. What you're describing is commonly associated with a bad or failing alternator or a bad alternator relay. If you would like a professional to assist you with this repair, contact a professional mobile technician, such as one from...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...