Mercury Cougar Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Mercury Cougar
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Mercury Cougar ProblemsCheck Engine Light on Due to Clogged EGR Passage in Intake Manifold
The Check Engine Light can illuminate with codes due to the lack of EGR (exhaust gas recirculation) flow caused by the intake manifold passage plugging up with carbon and oil. The EGR valve has to be removed and the passage cleaned thoroughly. Partial restriction of this passage can cause Smog test failures for the NOx emissions without causing a drivability symptom.
When engine gets hot and you start it it misfires for about 1 minute and then smooths out. Cold start ups run smooth. I need a fix for this problem!
The battery light may illuminate on the instrument panel because the alternator wire harness connector is damaged. A new connector kit is available and should be installed to correct this concern.
Mercury Cougar QuestionsDrivers side door will not open from the inside have to roll down window and ope (1 answer)
It this most likely a broken cable?
Cut the right side cat off and welded a 45 degree exhaust pipe in and now it runs worse , I had two codes for o2 sensors bank 1 , replaced the down stream , up steam was replaced about 3 years ago so didn't do that one , there's a lot of pinging when I first take off but once it hits 3500...
turn signal comes on when activated but only flashes intermittenly, stops completely at times