SURGING

2000 Mercury Cougar

Tiny

scott79124

September, 11, 2007 AT 2:14 PM

I have a 2000 Cougar, 100131 miles, V6, I travel thirty miles to Denver every weekend, on the way home when I hit 70-75 the engine starts surging until I shut the overdrive off. Any idea what could be causing this?

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Tiny

kwatson

September, 19, 2007 AT 6:15 PM

I've got the exact same problem with my 2000 cougar v6 with about 90k miles. While driving, the RPM's bounce around, the throttle pushes down, and the car 'surges' forward. I was told this was an O2 sensor/Cat converter problem, so I removed the cat and straight piped it, it didn't fix the problem. Anyone have any ideas?

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