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Cylinder one misfire

Tiny
PEARL/LAURA
  • MEMBER
  • 2005 DODGE CARAVAN
  • 3.3L
  • 2WD
  • AUTOMATIC
  • 84,386 MILES
My engine light came on and the van was Idling rough code for multiple misfires. Got a new coil. Then next day light came back on for cylinder 1 misfire, only rough when first starts and drives fine. What would cause this? Have cleared the code 2 times now and still has this issue and same code? What can I do to fix? Had a full tune up last year. The van only has 84,368 miles on it.
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Tuesday, March 30th, 2021 AT 4:26 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I attached a guide for you for misfires.

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

I would start with the set of plugs. 84,000 on the plugs is about the life of them.

https://www.2carpros.com/articles/how-to-change-spark-plugs

While you are doing that, I would check the compression to be sure there is nothing wrong with the cylinder.

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

The last thing I would check is the fuel pressure. Low fuel pressure will cause misfire codes.

Fuel Pressure .................... 400 kPa ± 34 kPa (58 psi ± 5 psi)

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

Roy

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Thursday, April 1st, 2021 AT 7:35 AM

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