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Code PO300 tried to fix

Tiny
BROOKMILLER
  • MEMBER
  • 2003 NISSAN SENTRA
  • 179,000 MILES
I have the code po300 and ive tried to fix it and spending countless money on parts I don't need cause its not helping the misfire issue need help

replaced the wire set and cleaned all the sensors and everything but the problem is still there?
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Thursday, October 11th, 2012 AT 3:28 AM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Random multi cylinder misfire. May be a coil problem, plugs, egr valve vacuum leaks I would try and get a run on an engine oscilloscope, this will help nail down the exact cause of this problem.
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Thursday, October 11th, 2012 AT 8:26 AM

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