I had a P0302 I replaced the spark plugs, the.

Tiny
BMASE78
  • 1997 GMC SONOMA
  • 120,000 MILES

I had a p0302 I replaced the spark plugs, the wires are realativley new. I drove the truck for a couplr days and now the same code is back. What could be causing the plug in clinder 2 to foul out like that?

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Wednesday, January 9th, 2013 AT 3:49 AM

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Tiny
HMAC300
  • EXPERT
  • 47,000 POSTS

Check yoru fuel pressure first and if that is ok check for a vacuum leak. What engine is it ecause fuelpressures are different

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Wednesday, January 9th, 2013 AT 3:30 PM

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