Skip the auto shop - Our mechanics make house calls

Q: Why do the RPMs stay higher when I shift into Neutral?

asked by on

I just bought the truck and it just started doing this were im driving and if im above 2000 to 2500 rpms and usually drop out of 2nd and 3rd gear to neutral the rpms will stay had that rpm till i hit the brakes or if i go past 3000k rpms while driving it will get to 2500 down to 2000 rpms and stay there again till i hit the brakes.

My car has 12200 miles.
My car has a manual transmission.

A: Hello. The symptoms you describe can common...

Hello. The symptoms you describe can commonly be caused by a vacuum leak or faulty idle air control valve. A vacuum leak may allow unmetered air into the engine, which may causing the idle to stay high when the transmission is put into neutral. It may also be possible that the idle air control valve has malfunctioned and is causing the issues. The idle air control valve is the component that is responsible for maintaining and adjusting engine idle speeds. If it malfunctions it may cause an erratic or irregular idle, as you are experiencing. I would start by closely inspecting the vehicle for any vacuum leaks, perhaps in the form of a leaky gasket or worn out hose, and then move on to testing the idle air control valve.

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: RPM's are higher than normal on gear changes

Hello. It may be possible that the computer is programmed to delay shifting when the vehicle is cold, in order to help warm up the vehicle faster. Once the vehicle warms up, however, shifting should return to normal. If the...

Q: I have a 1998 ford ranger(AT) its shifting roughly, when i come to a stop, the truck wants to keep going, and as a result, the truck stalls out.

The torque converter clutch is not releasing as the transmission is shifting. Try pulling the fuse to the torque converter labeled as TCC and see if the symptoms change. If the vehicle stops acting up, then the torque converter clutch...

Q: My truck is burning oil and the engine is hot when your outside of the truck

Hello. If your truck is telling again that you need an oil change too soon then there is either something going on with the engine, or the system was not reset when the oil was changed. Most of the time...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...