Engine misses at idle and throughout driving range, OBD code p0300

1998 MERCURY VILLAGER
168,000 MILES
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NHUNT001
  • MEMBER
  • 1 POST
Van drove fine yesterday morning anf then in the afternoon it ran really rough, and the CEL light came on. I read the codes P0325, and P0306. I check the fuel injector in the 6th cylinder and it was not functioning properly replaced it, and now I ge the same rough idle and missing through driving range, but the code is now P0300. What could it be and where do I start. I have recently replaced the cap, rotor, spark plugs, wires, and distributor.
Aug 6, 2012 at 7:59 AM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check your fuel pressure if it's low it will cause this code. If still screwed up check for vacuum leak as well. fuel pressure shold be 37-43 psi if below that then it's a fuel pump or filter clogged.
Aug 6, 2012 at 8:16 AM
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