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Tiny
SNAPMAN
  • MEMBER
  • 2003 ISUZU
  • V8
2003 isuzu box truck code po300 changed fuel pump mass air flow plugs coils are good
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Tuesday, August 9th, 2011 AT 12:48 AM

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Tiny
KHLOW2008
  • EXPERT
P0300 is random misfiring and it could be due to clogged fuel lines/filter, engine compression or fuel pressure other than those you have checked/replaced.
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Tuesday, August 9th, 2011 AT 12:40 PM

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