Q: Irregular revving

asked by on

Good day, when I start my car the revs goes to 2000rpm and slowly comes down. When I drive and stop at a traffic light it idles at 2000rpm. When I engage in a gear and release again it returns to just under 1000rpm. Also when I drive 40mph and remove my foot from the acceleration is feels like is jurks a bit. Please help. I have replaced the throttle body incl the TPS sensor as well as the MAP sensor. Regards

My car has 161500 miles.
My car has a manual transmission.

Is your Check Engine Light on? That may indicate that there is a diagnostic trouble code (dtc) stored. The code may help pinpoint which component requires further testing. Sometimes a dirty idle air control valve will stick during operation causing the symptoms you described. It may be cleaned and work okay, but most of the time it is best to replace it. Also, check to make sure that the gas pedal and linkages are not sticking. If you help testing this, a certified technician, like one from YourMechanic, will be able to diagnose the cause of the rough idling and jerking problem.

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. Irregular revving

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: Can't find ebrake release

Hello. On this particular vehicle the e-brake will not engage the standard way of pushing it all the way to the floor after it is engaged to make it release. There will be a little lever to the left of...

Q: A/C and heat are not working properly. Car blows heat in summer and cool air in winter.

Common causes of no cabin heat include malfunctioning blend door(s) (part of the in-dash ventilation network), a faulty or stuck heater control valve, a plugged heater core, stuck open engine cooling thermostat, collapsed hoses, and low coolant level. The cost...

Q: Why does my car loose RPM when I'm driving?

Hi there. First check all of the fluids and make sure that they are full and top off all low fluids. Then check the battery and make sure that it has a full charge of 12.6 volts. If the voltage...

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.