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1998 Volkswagen Jetta Random Misfiring code

Tiny
VWJOE
  • MEMBER
  • 1998 VOLKSWAGEN JETTA
Engine Performance problem
1998 Volkswagen Jetta 6 cyl Two Wheel Drive Automatic

It is misfiring on cylinders 3 and 5. Code reader came up random misfiring code po3oo. Can you help. I've change out spark plugs, plug wires coil and still have issues.
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Friday, September 4th, 2009 AT 4:59 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Engine misfires 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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Friday, September 4th, 2009 AT 5:26 AM

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