Code P0301 cylinder one misfire

2008 CHRYSLER SEBRING
172,463 MILES • 2.4L • 4 CYL • 2WD • AUTOMATIC
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CHAVISPIERRE
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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?
Apr 29, 2020 at 5:12 PM
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ASEMASTER6371
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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
Apr 29, 2020 at 5:52 PM
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CHAVISPIERRE
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Yes I’ve done all of that and it's fine.
May 6, 2020 at 3:10 PM
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CHAVISPIERRE
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Have been doing some research and it’s saying it maybe the throttle position sensor or the PCM is bad.
May 6, 2020 at 3:11 PM
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ASEMASTER6371
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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
May 6, 2020 at 3:50 PM