1997 Jeep Wrangler Trouble code P0300, multiple misfiring

1997 JEEP WRANGLER
94,875 MILES • 6 CYL • 4WD • MANUAL
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GOSAND3
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  • 2 POSTS
Have had frequent recurrence of Check Engine light, with codes of P0300, P0302, P0305. At least once have had ONLY P0300, multiple misfiring. Have NEVER any indication of an actual misfiring,by sound or feel.
Sep 2, 2010 at 6:49 PM
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MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
I would change plugs with original equipment units, clear all codes.

If problem persists it is a possible PCM problem.

Have dealer or trusted garage measure spark output.
Sep 3, 2010 at 7:27 AM
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