2003 Hyundai Tiburon Misfire

2003 HYUNDAI TIBURON
144,000 MILES • 2.7L • V6 • AUTOMATIC
Avatar
PHINFAN13
  • MEMBER
  • 12 POSTS
My engine is reading the P0303 code and the person that read it told me it was a cylinder 3 misfire but it has read this three times in one month each time I've replaced the plug and this time the wire...if it still displays this code what might be causing this?
Oct 22, 2014 at 6:53 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
If it comes back, it could be a compression issue with that cylinder or an injector issue. Tell me, since you have replaced the plug 3 times, what does the plug look like when you remove the old one?
Oct 23, 2014 at 6:16 PM
Avatar
PHINFAN13
  • MEMBER
  • 12 POSTS
It is black but the plastic white center is in tact but overall very black
Oct 23, 2014 at 6:41 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CERTIFIED EXPERT
  • 110,175 POSTS
That leads me to believe you may be getting too much fuel to that cylinder. Confirm that compression is good and then check for a stuck injector or fuel pressure that is too high due to a faulty regulator.
Oct 24, 2014 at 5:15 AM