Brandon.S
New Member
- Joined
- Dec 27, 2015
- Messages
- 11
- Reaction score
- 0
- Points
- 1
- Vehicle Year
- 94
- Make / Model
- Ford
- Transmission
- Manual
Losing fuel prime, looking for advice
My 94 4.0 loses fuel prime over night. I ran a fuel pressure test and when the engine was turned off the pressure dropped fairly slowly, only about 3 psi in 3 minutes.
Because the fuel pressure dropped slowly, I didn't expect a fuel pressure regulator issue-- in addition there is no fuel in the vacuum line. Also, because the truck started fine when warm, I didn't expect a leaking injector.
However, I replaced the fuel pump assembly and filter and the problem persists.
Looking for advice as what to look for next.
My 94 4.0 loses fuel prime over night. I ran a fuel pressure test and when the engine was turned off the pressure dropped fairly slowly, only about 3 psi in 3 minutes.
Because the fuel pressure dropped slowly, I didn't expect a fuel pressure regulator issue-- in addition there is no fuel in the vacuum line. Also, because the truck started fine when warm, I didn't expect a leaking injector.
However, I replaced the fuel pump assembly and filter and the problem persists.
Looking for advice as what to look for next.
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