Fuel psi

[warrior24]

Where and how do i check the fuel psi on my Ranger I have a fuel psi/vacuum gauge. I tried connecting it to the vacuum line on the FPR but no pressure or vacuum also tried the vacuum line that goes to the FPR it has vacuum. Do I test the schrader valve on the fuel rail. If so what special adapter do I need?

 

[warrior24]

I am having the problem where I have to cycle the key a few times for the fuel pump to come on for it to start. Then it starts fine otherwise it takes alot of cranking to get it to start.

 

[dogboy]

To test fuel pressure, you need to go to the schrader valve on the side of eth fuel rail (I haven't looked in a while, but I think it's on the side, not the front).

In my auto shop class, we had a whole kit that had the adapters for most all makes and models, so I couldn't tell you what one you need.
You may be able to take your tester to NAPA, and they might be able to match one up to your tester that is for a Ford.

I did quiet a bit of testing with my Ranger with the fuel system in shop class, and if I recal, the PSI should be between 35 and 43psi with key on engine off, and 30-40 with the engine running. This is a for a 93 4.0L, I don't know what you have
I can check later, and reply again, but I need to leave right now. I'll get you the Chilton specs tonight.

 

[warrior24]

sweet thanks btw I have 92 4.0