Code P0301 cylinder one misfire

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?

Wednesday, April 29th, 2020 AT 5:12 PM

4 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

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

CHAVISPIERRE

MEMBER
7 POSTS

Yes I’ve done all of that and it's fine.

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Wednesday, May 6th, 2020 AT 3:10 PM

CHAVISPIERRE

MEMBER
7 POSTS

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

ASEMASTER6371

MECHANIC
52,797 POSTS

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