OBD2 CODE READING PO300

  • Tiny
  • sunnylexus
  • 2002 Chevrolet Truck
  • 150,000 miles

Obd2 code reading po300. Engine lope on #3& 4 cyclinders. Change spark pluges-coil-injecters and wires.

Sunday, January 20th, 2013 AT 5:01 PM

1 Answer

  • Tiny
  • hmac300
  • Expert
  • 42,176 posts

Check your fuel pressure it should be 60-66 psi at rail with key on if a small block. If big block 54-62 psi if pressure ok check for vacuum leak with choke spray

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Sunday, January 20th, 2013 AT 6:05 PM

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