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Thanks for your report. I'm sure this will help somebody along the way. Interestingly enough, we don't hear about a lot of pressure regulator failures on the 2.5 TBI cars, but an occasional failure on the turbo models with the attached vacuum line.

I experienced a failure of the pressure regulator on a Ford (302) 5 liter throttle body system (mid 80's era). The symptoms for this failure were high fuel pressure, poor fuel economy, an O2 code, and occasional black smoke out the tail pipe, especially on acceleration.
 
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