1990 MERCURY COUGAR THAT IS BUCKING AND SPUTTERING.

  • Tiny
  • Kimberlyannperkins
  • 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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Wednesday, August 15th, 2012 AT 2:09 AM

1 Reply

  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

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

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Wednesday, August 15th, 2012 AT 2:35 AM

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