2003 Hyundai Tiburon Misfire

Tiny
PHINFAN13
  • MEMBER
  • 2003 HYUNDAI TIBURON
  • 2.7L
  • V6
  • AUTOMATIC
  • 144,000 MILES
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?
Wednesday, October 22nd, 2014 AT 6:53 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 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?
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Thursday, October 23rd, 2014 AT 6:16 PM
Tiny
PHINFAN13
  • MEMBER
  • 12 POSTS
It is black but the plastic white center is in tact but overall very black
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Thursday, October 23rd, 2014 AT 6:41 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 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.
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Friday, October 24th, 2014 AT 5:15 AM

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