Fuel Pressure Test

**Streight1** · 06-20-2007, 12:42 PM

I have a 1993 GMC 1500 w/ a 350 TBI. I am looking to test the fuel pressure but am unable to locate a port to connect a gauge to. Can anyone tell me if there is one? I have looked at the fuel rails running on top of the manifold to the TBI but there is not one there.

**GaryL** · 06-20-2007, 02:06 PM

There isn't a test port. I tested my old 89 Suburban a few years back and, if I remember correctly, I had to disconnect the fuel line from the throttle body and use some adapters and rubber hoses that came with my pressure tester to do the test.

**84fiero123** · 06-20-2007, 10:12 PM

Originally Posted by GaryL

There isn't a test port. I tested my old 89 Suburban a few years back and, if I remember correctly, I had to disconnect the fuel line from the throttle body and use some adapters and rubber hoses that came with my pressure tester to do the test.

I disconnected the line before the fuel filter to make sure the filter was not the culprit or gave me a faults reading.

It is a pain.