HAVE PO300 CODE REPLACED PLUGSWIRESFUEL PUMP ...

  • Tiny
  • bobkz1000
  • 1997 Chevrolet Truck
  • 205,000 miles

Have po300 code replaced plugs, wires, fuel pump, fuel filter inector spyder, fuel sending unit & wires in tank intake plainom gasegtt run all kides of fuel cleaner in it clear codes start it let it run less then a min. Po300 code comes right back

Tuesday, October 30th, 2012 AT 6:53 PM

2 Answers

  • Tiny
  • hmac300
  • Expert
  • 41,700 posts

Check fuel pressure first, then check for vacuum leak at manifold. If both of those good then ccheck compression 60-66 psi for anything other than a 7.4l 56-62 for 7.4L

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Tuesday, October 30th, 2012 AT 7:05 PM
  • Tiny
  • bobkz1000
  • Member

Thanks will get right on it will let you know

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Tuesday, October 30th, 2012 AT 7:10 PM

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