ENGINE

  • Tiny
  • RICK RR
  • 2000 Cadillac Seville
  • V8
  • 2WD
  • automatic
  • 32,000 miles

Enter your question.2000 4.6 northstar eng idles reoght with code p0303 #3 cylinder misfire--new plugs, new#3 injector, and new fuel filter?Still shakes

Thursday, December 23rd, 2010 AT 9:26 PM

1 Answer

  • Tiny
  • mhpautos
  • Expert
  • 29,842 posts

Check compression, check for vacuum leak around this cylinder, check that the injector is getting a firing pulse, start here.

Mark (mhpautos)

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Friday, January 7th, 2011 AT 11:42 PM

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