Mercury Cougar Repair and Maintenance
A guide to problems, costs, maintenance and repair for your Mercury Cougar
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Mercury Cougar ProblemsBattery Light Due to Damaged Alternator Connector
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.
White smoke coming from the exhaust could indicate that a head gasket has blown or there is a cracked cylinder head. Our technicians tell us that removal and inspection of the cylinder heads will be required to confirm a crack is present.
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.
Mercury Cougar Questionswhere is the EGR valve located on the base 2.0 liter engine? (2 answers)
my check engine lite comes on intermittenly, codes show possible plugged EGR
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...