Skip the auto shop - Our mechanics make house calls

Q: what is causing really rough idle.

asked by on

what is causing really rough idle.
My car's transmission is unknown to me.

A: Rough idling engines can typically be cause...

Rough idling engines can typically be caused by ignition system or fuel system failures. This can be things like spark plugs, spark plug wires, distributor cap, distributor rotor, the distributor itself, fuel injectors, fuel filter, fuel pump, etc. I would recommend hiring a qualified professional to test your fuel and ignition system for errors which will diagnose the rough idling. This is where the issue lies the majority of the time when the engine is idling rough.

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

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: Need a diagnosis.

I would ask for help from one of the mechanics at YourMechanic. They have the experience and equipment to diagnose exactly why your vehicle will not start.

Q: My car turns off when at idle or in a traffic light

This is a common sign of a dirty or failing idle air control valve. The idle air control valve reads the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and...

Q: Sputtering and slow acceleration. At high speed it hesitates and seems as it's not receiving fuel.

Hi There, This may be a sign of a faulty fuel pump or fuel pressure regulator. As you know, when you turn the key to on, the fuel pump is activated and the fuel system is primed with fuel at...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
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.