QUOTE(hot_shoe914 @ Aug 25 2009, 08:20 PM)
QUOTE(SLITS @ Aug 25 2009, 09:49 PM)
Before I swap them I would trace them ... fuel running down your arm into your armpit and below causes one hell of a rash ... follow the line coming from the cap end to its destination. If it isn't hooked into the "T" in the return line then that's the problem. If it is, then something else is funky.
I swapped them now it doesn't run at all. #0 minutes of wasted labor. Now I get to go swap them back. The "T" actually goes on the middle port. One coming from fuel supply goes opposite cap. Sigh, what a PITA!!!
I don't have a diagram in my hand of the ports. The cap holds the pressure relief spring in and the port next to it is the Return. That goes to the "T" as you have fuel coming back from the pressure regulator also.
In taking one apart, I thought the center port was "D" for pressure (druck). It would be hooked to the passenger side fuel rail.
The bottom port would then be "S" suction which is connected to the fuel filter and then to the 8mm plastic line.
If you switched the Supply and Return lines through the body ... small line is Return, then your pump would be trying to suck fuel through about a 2 mm hole instead of an 8mm. This would cause fuel starvation.
Or your new pump is krap. You need to hook a pressure guage (at least 0-30 psi) and tap it into the fitting for the cold start valve in the driver's side fuel rail. With the pump on, you should read 29.4 psi.
I have several of these pumps and can look at one tomorrow to be sure.