Codes P0300 and P0118, misfires, rough idle, car shaking and check engine light on

2007 DODGE CHARGER
100,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC
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FR33SH
  • MEMBER
  • 1 POST
I’m having trouble with my car listed above. I get codes P0300 and P0118. i changed the temperature sensor, spark plugs, coils, cam and crank sensors and the runner valve. every code that came up has been tended to, but i am still getting misfire and rough idle. even my mechanic has been dumbfounded for the last 2 weeks.
Jun 6, 2020 at 3:52 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good afternoon,

Did anyone check the fuel pressure? That is the most common issue for the 300 misfire code.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

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

You can rent a tester at a parts store to verify.

Roy
Jun 6, 2020 at 4:45 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,512 POSTS
Also we should do a compression test as well.

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

Please run down this guide and report back.
Jun 6, 2020 at 5:43 AM
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