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My 94 f 250 acts like its vapor locking in the heat of the day

Tiny
MICHAEL6735
  • MEMBER
  • 1994 FORD F-250
  • 250,000 MILES
I changed fuel filter and fuel regulator valve I can here both pumps run when I cycle the key its just when its realy hot one tank will qwit then flip the switch and the other will qwit untill it finaly dies than an hour later later it runs fine
Wednesday, August 31st, 2011 AT 3:20 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
There are a lot of things that can be happening but vapor lock is not one of them. You're going to have to run some fuel pressure tests at various points in the fuel system to get a handle on what is happening.
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Wednesday, August 31st, 2011 AT 4:03 PM

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