Skip the auto shop - Our mechanics make house calls

Q: Engine light comes on and idles roughly.

asked by on

The Engine light is on and the car idles roughly. It was diagnosed earlier as an engine misfire.

Single cylinder misfires are usually caused by ignition components which is where I would start with on this car. Verify the ignition cap and rotor are still in one piece and that the wires are not arcing losing spark. Have a mechanic scan for codes to find out which cylinder is misfiring (P0301 for cylinder 1, P0305 for cylinder 5, etc.).

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
  1. Home
  2. Questions
  3. Engine light comes on and idles roughly.

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: Engine light On and car jerks from 2000-3000rpm

Continual failure of the camshaft sensor may suggest that you have some bad wiring leading to the plug where the cam sensor is plugged in. The internal circuitry and the wires that connect the sensor to power and to the...

Q: Car dying without warning

Hi. There could be several possibilities that are causing your problems. A faulty fuel pump relay that is heating up would disable the fuel pump and therefore starve the engine of fuel. A fuel pressure test, during steady cruise, will...

Q: Have a blown engine

If you are referring to a replacement engine other than the one originally specified for your VIN number, unfortunately production vehicles can only be re-fit with exact replacement engines because engine computers are not interchangeable at all. And, you cannot...

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
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...
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.