Mechanics

THAT IS BUCKING AND SPUTTERING.

1990 Mercury Cougar • 73,000 miles

I have a 1990 Mercury Cougar 3.8 NA that is bucking and coughing at all speed and has a very rough idle only while in drive with black smoke coming out the exhaust. It has new head gaskets, water pump, alternator, and other misc. I need to figure out what is wrong cause im stuck at my sisters house and need to get home.
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Kimberlyannperkins
August 15, 2012.




Start with a compression test to verify the motor is good.

Make sure the firing order is correct.

It could be a bad injector or vacuum leak as well.

Roy

ASEMaster6371
Aug 15, 2012.


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