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2003 Dodge Truck P0300 bairly idles, runs rich, lopes

Tiny
RLALLEN
  • MEMBER
  • 2003 DODGE TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 132,000 MILES
Mult miss on scanner all cyls-loads up lopes, extra rich exh cant breath in the shop, spark advance on scanner 126* yes 126*, will smooth out above 3000, still counts all cyl miss. Customer eventually told of a crank sensor code months ago?
Monday, January 19th, 2009 AT 6:30 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
2003 Dodge Truck p0300 bairly idles, runs rich, lopes

P0300 Random misfire normally caused by vacuum leaks and bad fuel.

Engine misfiring can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel
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Monday, January 19th, 2009 AT 6:48 PM

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