Q: How can I find out what exactly is happening in my misfire?

asked by on

I diagnosed my car and got a code P0301, it said my first cylinder had bad combustion, dolt know exactly what that means. I asked around and I was told that spark plugs are common failures, I changed them but didn't make a difference, anything else I can do?

My car has 250000 miles.
My car has a manual transmission.

Hello there. Misfires are a common problem with your 1997 Subaru Impreza as the vehicles ages. The most common failures are the spark plugs, coil, plug wires, fuel injectors, fuel pump, vacuum leaks, or an oxygen sensor. You have done well in replacing the spark plugs first as they are commonly the at fault component.

If you replaced the spark plugs and the fault is still present, the vehicle will need a proper diagnosis to determine what is causing the misfire. A qualified technician, such as one from YourMechanic, will be able to diagnose the misfire condition and proceed with any repairs required to resolve the 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. How can I find out what exactly is happening in my misfire?

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: P0301

Diagnostic Trouble Code P0301 means that Cylinder No. 1 is misfiring but the causes of that can be very varied. The fuel injector could simply be dead or there is little cylinder compression due to a burned valve or leaky...

Q: 98 Chevrolet Tahoe cranks but won't start.

Hi there. If your fuel pressure is normal (35 psi or higher) then check the spark plugs and see if they are getting burn spots. If they have burn spots, then the injectors may not be working. If the fuel...

Q: Car hard to steer and feels like it is dragging something.

Hello, from your description is seems like the vehicle is possibly dragging something. Your best option is to get the aid of a mechanic to take a look and diagnose what's going on.

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...