Q: Inconsistent RPM. It is too high majority of the time

asked by on

I have santro and is giving fast pickup with increase in rpm in normal run also I have checked and cleaned throatal body adjusted the rpm but still the problem exists kindly provide corrective measure to be taken

My car has 149000 miles.
My car has a manual transmission.

Hi there. If a high idle is the concern a sticking idle air control valve or a vacuum leak could be the problem. Has anyone attempted an idle adjustment? If so, reset it back to the factory position. Listen around the engine compartment for a "hissing" or suction type noise as this will be an air leak into the intake and could cause a high idle is the check engine light on?

Check for codes that may be stored in the engine computer as there may be a current or pending code that could lead you in the right direction. An idle air control valve could be sticking or have contamination buildup in the valve that could be causing the erratic/high idle. Sometimes cleaning will correct the condition, but ultimately the valve needs to be replaced if this has happened.

I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. YourMechanic has several available technicians that can assist you with a car’s idling issue.

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. Inconsistent RPM. It is too high majority of the time

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: I have replaced just one ignition coil, but not other 5. Will they fail, what mileage to change, and will it affect performance?

If you take the price you paid for the one coil and multiply it by five the price will be close to what it would cost. Going up hills is always a gas usage problem and will affect mileage. You...

Q: battery light comes on for a few minutes and goes off

Hi, thanks for writing in. Your charging system and battery should be performance-tested to see if either one is not up to specifications. You may have a weak battery that takes a few minutes to get above the point the...

Q: very low power in 2nd gear engine knocking noise

If the knocking noise happens while you feel like the vehicle is chugging, this could be a misfire. Misfires are ore likely to happen when the engine is under a load, like during acceleration. Usually a misfire will cause the...

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...
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...
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.