Code P0301 cylinder one misfire

Tiny
CHAVISPIERRE
  • MEMBER
  • 2008 CHRYSLER SEBRING
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 172,463 MILES
My car is throwing a cylinder 1 misfire and I have already done new coils, plugs, O2 sensor, switched around injectors, new cam and crank sensors and still getting the same code. I don’t know what else to do. Any ideas?
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Wednesday, April 29th, 2020 AT 5:12 PM

4 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good evening,

The first thing I would do is a compression test to be sure the engine has no internal issues.

https://www.2carpros.com/articles/how-to-test-engine-compression

I would also do fuel pressure test as well to be sure sufficient fuel is at the rail for the injectors.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Did you verify spark to number 1 cylinder or all of them?

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Roy
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Wednesday, April 29th, 2020 AT 5:52 PM
Tiny
CHAVISPIERRE
  • MEMBER
Yes I ve done all of that and it's fine.
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Wednesday, May 6th, 2020 AT 3:10 PM
Tiny
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  • MEMBER
Have been doing some research and it s saying it maybe the throttle position sensor or the PCM is bad.
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Wednesday, May 6th, 2020 AT 3:11 PM
Tiny
ASEMASTER6371
  • EXPERT
What were the exact results of the tests I asked? Fine to you may not be fine. I need that information.

No to both. Neither one has anything to do with the code.

Roy
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Wednesday, May 6th, 2020 AT 3:50 PM

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