1993 Mercury Cougar engine

Tiny
CHRISSY99
  • MEMBER
  • 1993 MERCURY COUGAR
  • 3.8L
  • V6
  • RWD
  • AUTOMATIC
  • 120,000 MILES
When accelerating and maintain a speed, everything is fine. When I totally let off the gas, its ok too. The problem is when I let off the gas just a little to slow down some, you feel a slight bucking. At a slower speed you feel a harder bucking at about 35mph or less, and slight is more around 65mph or less. The C02 sensor has been replaced. That didn't change the problem.
Friday, November 28th, 2014 AT 9:03 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Scan for codes and check fuel pressure first with a gauge should be 30-45 psi key on engine off. Auto parts rent it
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Friday, November 28th, 2014 AT 9:17 AM

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