Author Topic: Fuel Rail Test Port location? (Read 3589 times)

achtungE30 · « **on:** June 25, 2007, 02:25:23 PM »

I want to connect a fuel pressure gauge to test and diagnose some issues. Anyone know how to get to the test port?

RED IS 91 · « **Reply #1 on:** June 25, 2007, 03:05:48 PM »

I tested my fuel pressure back under the backseat .I believe
the only other way would be to connect it before the fuel rail .

achtungE30 · « **Reply #2 on:** June 26, 2007, 08:29:24 AM »

Could u point me in the real oem diagram perhaps which fuel line connection is return at the pump?

badboypolar · « **Reply #3 on:** June 28, 2007, 03:08:04 PM »

If you are looking at the engine from the drivers side, the fuel return line is on the left side, the fuel feed is on the right side (closest to the firewall).

RED IS 91 · « **Reply #4 on:** June 28, 2007, 04:27:26 PM »

The curved one in the photo is the supply I believe. That's where you would check pressure with a fuel pressure guage.

kowalski · « **Reply #5 on:** June 28, 2007, 04:32:13 PM »

easiest place would be in the engine bay on the fuel line (not the return line).

RED IS 91 · « **Reply #6 on:** June 28, 2007, 04:42:45 PM »

Quote from: kowalski;28736

easiest place would be in the engine bay on the fuel line (not the return line).

Those fuel lines in the engine bay are not the easiest to disconnect . When I replaced my injectors there was hardly any wiggle room with those lines.