- Joined
- Aug 23, 2015
- Messages
- 389
- Reaction score
- 87
- Points
- 28
- Location
- Virginia
- Vehicle Year
- 1988
- Make / Model
- Ford
- Engine Type
- 2.9 V6
- Engine Size
- 2.9
- Transmission
- Automatic
- 2WD / 4WD
- 4WD
- Total Lift
- 0
- Total Drop
- 0
- Tire Size
- 235/75/15
4.9 i6 300What engine in this truck?
There is no Fuel Pressure Sensor, so pumps may be shutting off but not because of pressure
Do not try to start engine
Jumper the OBD1 fuel pump slot
Turn on key
Watch pressure at the rail, should go up to 42-44psi and FPR will open and fuel will start to flow back to the tank, pressure should remain at about 43psi as long as key is on, and pumps should stay on the whole time
If pressure goes above 45psi then FPR is bad, assuming pressure gauge is acurate
FPR has a vacuum hose attached, check it for gasoline, shouldn't be any of course, if gasoline is in that hose then engine is being flooded out because of leaking/bad FPR
Gauge stops at 55psi, pumps still running.
There is no gas smell or fluid in vacuum hose.