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.

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Car has increased RPMs in neutral. Nissan Sunny 2008 (Japan Made)

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: Intermittent Oil Pressure Light shows still, please help!

Hi there. Check the oil pressure with the engine at 4000 RPM's. If the oil pressure is normal and high, then the oil pressure sensor is failing due to engine harmonic vibrations. If the oil pressure has dropped at...

Q: Issues with EVAP system

It is very possible you may have a vacuum leak causing a rough idle and too much air on acceleration causing sputtering and rough running issues. A smoke check of the induction system would be a good idea. Reading the...

Q: There is a repititive squeak during acceleration usually between 1,000 and 2,000 rpms. CVT

Hello. Typically squealing noises related to engine speed are attributed to the drive belts. It may be a pulley, or the belt itself slipping. This can happen for many reasons. It does not happen in Park because the engine is...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.