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2003 Saturn L300 P300 code won't go away!

Tiny
PLINKER4FUN
  • MEMBER
  • 2003 SATURN L300
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 123,000 MILES
I have had a P300 code on my Saturn for awhile. I have had the spark plugs, ignition coil replaced. Just had the fuel injectors cleaned, replaced the oxygen sensor and it still will not go away? Any ideas. My trust in any mechanic is going down the drain with my wallet. Any help would be appreciate!
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Tuesday, May 26th, 2009 AT 6:48 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
P0300 Random Misfire normally points to 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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Wednesday, May 27th, 2009 AT 4:59 AM

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