Join Date: Apr 2002
Location: Dandridge (Near Knoxville), TN, USA
Re: How to check fuel pressure
A tee in the fuel pressure line from the pump to the fuel rail is about the only way to test the LT. There is no pressure test port on the rail. The regulator is a pressure relief valve, that bypasses at the set pressure to pass excess fuel back to the tank, so that a pressure test anywhere between the fuel pump and regulator will give you the correct reading.
You can just pull the line from the pump off the rear of the rail, use a male 5/16" (8 MM) tee, and short piece of tubing between the rail and tee, fuel line from pump and line from gage to the other two ports of the tee, start the engine and read the pressure. You can also put the tee in the line from the pump under the tank, but not much room to work there, easier to do at the rear of the fuel rail.
PS: I just remembered how I did it once, used a spare quick connector set, tee, and long enough line to loop back around and hooked into the pressure line at the quick connectors. You just have to determine which line goes to the rear of the fuel rail.
I don't want to achieve immortality through my work...I want to achieve it through not dying.
EX: '01 Black LT, BAT BYKE (Totaled at 110,000 miles)
IBA SS, BB, BBG, 10/10ths.
No bike now, but maybe in the future.