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#1
08-09-2009, 11:27 AM
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1999 Mercury Mt. hesitation
'99 merc mt. runs "rough" and the check engine light comes on for a few seconds (but won't throw a code on the scanner). It gets really rough and hesitates (check engine light flickers) when going up hills.This happened about 2 months ago and had the plug wires changed,and the problem went away. O2 sensors? TPS? V6 140K. Do you think it's possibley a tranmission problem or engine only? Any ideas ??? Thanx;Mogs
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#2
08-10-2009, 06:48 AM
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Re: 1999 Mercury Mt. hesitation
If the check engine light is coming on, it should have a diagnostic code, either active or pending. You need to pull the codes. Could be a misfire, vacuum leak, loose intake air tubing, intermittent MAF sensor, etc.
-Rod
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