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1989 Lincoln Mark VI emission test failed

Tiny
JR1812
  • MEMBER
  • 1989 LINCOLN MARK VI
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
1989 v8 lincoln recently failed an emissions tes with very high hydrocarbons and carbon monoxide while idling the wierd thing was it passed while in gear any ideas what may be causing the emission problems while idling I was thinking maybe the o2 sensor
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Friday, January 11th, 2008 AT 7:58 PM

3 Replies

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
HC high is untreated fuel going throw he exhaust
most common is tune up
check spark plugs and wires
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Friday, January 11th, 2008 AT 8:05 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Yup I think its the o2
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Friday, January 11th, 2008 AT 8:05 PM
Tiny
JR1812
  • MEMBER
  • 2 POSTS
Thank you for the replies i'll check the plugs and wire as well as the o2 i'll update after it's done
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Friday, January 11th, 2008 AT 8:10 PM

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