1994 MERCURY MARQUIS FAILED EMISSIONS- HIGH HYDROCARBONS

  • Tiny
  • jrubioc5447
  • 1994 Mercury Marquis

Engine Performance problem
1994 Mercury Marquis V8 Two Wheel Drive Automatic 141000 miles

Can anyone tell me what it may-be besides spark plugs and coil pack cause I replaced them. Then I checked the cats and both good. Is there anything else I can do?

Do you
have the same problem?
Yes
No
Tuesday, October 19th, 2010 AT 6:45 PM

1 Reply

  • Tiny
  • rasmataz
  • Member

Could be a lean misfire due to vacuum leaks, injectors, fuel pressure problem to include and engine burning oil thru valves and rings-

Was this
answer
helpful?
Yes
No
Wednesday, October 20th, 2010 AT 7:41 AM

Please login or register to post a reply.

Similar Questions