Q: Misfiring - 2010 Chevrolet Cobalt

asked by on

Changed spark plugs and still has miss fire. Old plugs were black

My car has 88000 miles.
My car has a manual transmission.

A misfire can be caused for several reasons such as bad plugs (which you have fixed), detonation (bad timing), bad ignition coil, vacuum leak, faulty fuel injectors, low fuel pressure or faulty spark plug wires to name a few. This may require some specific diagnosis that will require the computer in your car to be scanned for fault codes which will indicate specifically what the issue is. If you need further guidance on this, a certified professional from YourMechanic can diagnose the misfire issue firsthand and assist with a repair.

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. Misfiring - 2010 Chevrolet Cobalt

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: Q: Misfiring

This is often times related to what is called an idle air control valve which controls the air/fuel mixture at idle speed. When this is not working properly, this can cause the car to run either too rich (too much...

Q: Does a car leak antifreeze when it is started or does it matter?

You should not see any leaks from a vehicle. The leak is most likely from the water pump on the engine. You should have the cooling system pressure tested to check for any leaks in the system. If you need...

Q: 95 honda accord long crank to get started than runs like a champ what causes that

Hi there. In most cases when an engine sits for a while and is hard to start, it is caused by fuel injectors that are clogged with excessive debris or a dirty throttle body. It is also possible that the...

Related articles

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.
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.