Code p305, misfire on restart?

2007 CHRYSLER 300
235,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC
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RYAN M.
  • MEMBER
  • 1 POST
Car misfires when restarted only never in morning when first driven. I can drive for an hour it doesn't happen only on restart and doesn't go away until next day when cold. Code p305 cylinder 5 misfire. Thinking I need new injectors most likely?
Jun 2, 2023 at 4:07 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

It could be related to the injector, but there are other things as well.

If you allow the engine to fully cool during the day, does it still have the misfire? I ask because it sounds like it is being affected by heat.

Try this. Switch the coil pack from cylinder 5 to a different cylinder. See pic below. Switch cylinder 5 and cylinder 3 coils. See if the misfire moves to cylinder 3.

Let me know.

Joe

See pic below.
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Jun 2, 2023 at 9:37 PM
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