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1997 Jeep Wrangler Trouble code P0300, multiple misfiring

Tiny
GOSAND3
  • MEMBER
  • 1997 JEEP WRANGLER
  • 6 CYL
  • 4WD
  • MANUAL
  • 94,875 MILES
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.
Thursday, September 2nd, 2010 AT 6:49 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
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.
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Friday, September 3rd, 2010 AT 7:27 AM

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