Skip the auto shop - Our mechanics make house calls

Q: IDL - RPM is higher then normal

asked by on

I changed the COIL, sparks, crankshaft sensor, i cleaned the TB from outside without removing it.then my RPM on Neutral (N) is between 1100 and 1300 , it should be on 800 . While on Drive the car IDL is 1100, when accelerating and moving the RPM seems higher then normal and increase acceleration of the Car . Sometimes the AC compressor get disconnected for a while and return to normal stage again while driving

My car has 225000 miles.
My car has an automatic transmission.

A: You should first check to make sure you do ...

You should first check to make sure you do not have any vacuum leaks. Scan the computer and diagnose any service codes. If you do not have any codes, then you may just have to relearn the idle of the vehicle computer by warming the engine with the A/C off put in drive and let idle for a few minutes in gear. Then put it in park and let idle for a few minutes. Do the same with the A/C on and blower speed set to medium and coldest settings. Recheck the idle and see if it came down. If it did, then you are okay. If it is still high, then have a mechanic inspect the engine for idle control issues.

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: Engine light flashing intermittently

This may be related to a faulty or dirty mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to being injected into...

Q: Truck is running rough, loses power, backfiring noise - 1994 Nissan D21

Hey there. I would check fuel pump output and condition of fuel injectors (flow rate and solenoid resistance). After that, I would evaluate the ignition system, including distributor, plug wires, timing. If you would like to have this checked for...

Q: All brake on my vehicle are locking up while driving

Hi there. There are a few things that will cause this. Most of the time when this occurs it is due to petroleum contamination in the brake system. If something other than brake fluid was put into the master cylinder...

Related articles

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...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.