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Runs really rough

Tiny
JAMES LINN
  • MEMBER
  • 1994 FORD THUNDERBIRD
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 232,000 MILES
My car will run for a minute or two then starts to run rough and dies. I have replaced the fuel pump, spark plugs, fuel regulator, and the pcv valve and fixed several vacuum leaks. The car has not ran for more than a few minutes at a time and the new spark plugs are already black and sooty, the car still run really rough and will not stay running.
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Saturday, June 11th, 2016 AT 9:34 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge auto parts rent it. the fuel regulator may be bad or no vacuum is going to it and making it too high.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Sunday, June 12th, 2016 AT 11:28 AM

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