FAILED EMISSIONS- HIGH HYDROCARBONS

1994 Mercury Marquis

Tiny

jrubioc5447

October, 19, 2010 AT 6:45 PM

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?

FOUND 741 RELATED QUESTIONS

1 Answer

Tiny

rasmataz

October, 20, 2010 AT 7:41 AM

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

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