1999 Hyundai Sonata misfiring

Tiny
1999BLUESONATA
  • MEMBER
  • 1999 HYUNDAI SONATA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 117,000 MILES
Replaced crank shaft position sensor, spark plugs, and balance shaft belt and car continues to misfire
Wednesday, February 25th, 2009 AT 8:35 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
1999 Hyundai Sonata misfiring

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, February 25th, 2009 AT 9:07 PM

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