I GOT A ENGINE LIGHT, P0303 - #3 CYN MISFIRE

  • Tiny
  • ao7777
  • 2002 Dodge Dakota
  • 170,000 miles

I have don't nothing yet just used my obdII scanner to get the code. Can it be spark plug, rotor and cap? I don't have compress gage and other compress gages.

Tuesday, July 31st, 2012 AT 1:15 AM

3 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

Start with a compression test. It sould be that, plug, coil, vacuum leak or injector. This is why you need a real diag before throwing parts at it.

Roy

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Tuesday, July 31st, 2012 AT 1:25 AM
  • Tiny
  • ao7777
  • Member

Do I need a compression Tester and which cyn hole? #3? How do I do a compression test?

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Tuesday, July 31st, 2012 AT 1:34 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,502 posts

Remove the plug. Unplug all coils. Crank engine with tester installed and read the readings for us

Roy

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Tuesday, July 31st, 2012 AT 2:16 AM

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