Key on the truck, pressure will shoot up, see how long it stays up.
One test to find where the pressure is leaking off is to do this... (I had a situation where I questioned the pump setup).
Put a set of small vise grips at the flex line after the regulator (or even on the return line down by the filter where it is rubber). Main thing is that it is flexible line after the FPR. Key on, pressure goes up, crimp the vise grip. Note if pressure goes down or not. Ok, now put the vise grips on the flexible feed line by the fuel filter. Key on, close the vise grips, see if pressure drops.
If pressure drops in first case, but not second, it is most likely leaking at the tank. If it drops at the second case, but not the first, it is at the injectors or FPR to the return line. If it leaks at both, it is injectors or FPR leaking to vacuum lines.
Note: if you install the Walbro without the checkvalve, it will leakdown pressure at the tank once you shut it off. Not a crucial issue, but you may have hard starting etc.
_________________
Brian Green
www.chitownsyty.com
syclone160@yahoo.com
<font size=-1>[ This Message was edited by: Tom Servo on 2002-02-18 07:14 ]</font>
