Skip the auto shop - Our mechanics make house calls

Q: Car has increased RPMs in neutral. Nissan Sunny 2008 (Japan Made)

asked by on

Hello, I have a 2008 Model japan made sunny. recently, I cleaned the throttle body using AC Delco spray and from then my car's RPM has increased from 0.9 to 1.5 when in Neutral. I changed the Air filter and it doesn't make any change. there is a screw type adjuster to adjust the RPM on throttle bosy but it is so tight that more force over it shall break it. Kindly let me know to get this solved as it is increasing the engine heat and consuming fuel highly. Thanks in advance.

My car has 205000 miles.
My car has an automatic transmission.

A: The computer over time learns to control th...

The computer over time learns to control the idle and after you cleaned the throttle body it will cause the idle to go up from the increased air getting into the engine. If you disconnect the battery for about two minutes then restart the engine and hold the idle to 1500 rpm until engine warms then put it in drive and let it idle for 3 minutes to relearn the idle. If after that the idle is still too high then you will need to have engine checked for vacuum leaks or idle control valve sticking problems in order to diagnose the rough idle.

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: Turbo damage in 1.2 TSI

Claimed by David Gaines Wooten

Q: Truck runs rough in 80 to 90 degree weather

With the age of your vehicle, there are likely a few things that need to be maintained. All of the recommendations about to be made depend on what other repairs have been made recently. Since the issues are related to...

Q: Code P1778.

Hello P1778 is the code for an issue with the stepper motor function. The CVT transmission on this vehicle uses a 4 position stepper motor to propel the vehicle. If the stepper motor goes bad, or has an issue it...

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...
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...
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.