Testing Fuel Pressure

[Doug]

Anyone know the proceedure to test fuel pressure?

Thanks,

Doug

[LRover]

There is a schrader valve on the fuel rack above the injectors where you can connect your test gauge. I don't have my manual in front of me but if I remember right it should read a constant 34psi (or there abouts) and should not leak down too quickly after you shut down the engine.

[Doug]

That's terrific. I'm amazed its that simple. Thanks, Michael!

Doug

[Doug]

Finally got around to looking for this schrader valve. Doesn't appear to be one on my '93 3.9. Shop manual says to attach a guage to the fuel line at the fuel filter. Anyone know what kind of guage will fit?

Thanks,

DW

[evilfij]

Thats what I thought, when i read that i was like only the newer trucks have the valve.

I would try to get something to fit where the input joins the fuel rail.

Ron