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Car stops running and bucks

Tiny
WESLEYWOOD2412
  • MEMBER
  • 2000 FORD TAURUS
  • 92,500 MILES
When at idle the car runs fine. It's a 2000 Ford Taurus SEL DOHC. When I press the gas and get up around 40 mph or above the car starts to buck back and forth and completely stops accelerating. I have replaced the fuel pump, the battery, the o2 sensors, the pcv valve, and the spark plugs, I'm thinking that it's the intake manifold and the gaskets I'm just trying to see who all agrees.

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Thursday, December 15th, 2011 AT 5:40 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
A vacuum leak won't wait till you are at 40MPH. Has the check engine light ever come on?
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Thursday, December 15th, 2011 AT 6:58 PM
Tiny
WESLEYWOOD2412
  • MEMBER
  • 2 POSTS
Well it sputters anyways but when this happens the check. Engine light starts flashing
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Thursday, December 15th, 2011 AT 8:06 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
If the light is flashing, that tells me there is a misfire. Have the computer scanned to identify where the problem is coming from. Most parts stores will do it for free.
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Thursday, December 15th, 2011 AT 9:33 PM

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