Quote:
Originally Posted by ossiblue
Strange, indeed. My first thought would be the accuracy of the gauge set. Do you have confirmation that it is reliable?
I'm with Bob on this one, though my experience is not as extensive as Tony's. Logic tells me that even if the WUR is allowing all fuel to pass through, there would be some pressure buildup that would register on the gauge.
BTW, you PM'd me by mistake, instead of Tony, regarding this issue. I forwarded you PM on to him.
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Larry,
The PM you received was addressed to you and it was not a mistake(?). Thanks for forwarding it. This CIS troubleshooting is taking too long to solve because of the wrong approach to solving this problem. A fuel pressure gauge is a mandatory tool and it took him this long to get one. Anyway, it would be better now that we could get some numbers about the fuel pressure provided he has a good working set.
Kristian,
Do us a favor and run the FP with pressure gauge installed and with the valve OPEN. We like to see the some fuel pressure and get a feel if the gauge you have is working or not.
Disconnect the return line to the fuel tank at the fitting located by the engine. Measure the flow rate (liters per min.) of the fuel going back to the tank. Next, reconnect the return line and make sure it is tight and not leaking. Run again the FP and take note of the following:
a). With FP running and the shut off valve OPEN, what is the pressure reading on the gauge?
b). Close the valve while the FP is running, what is the pressure reading on the gauge?
c). Repeat test 'a' FP running and valve OPEN. But this time pinch the return line (rubber hose) going to the tank and observe the pressure gauge. What pressure reading when the return fuel hose was pinched?
If you could provide some answers (fuel pressure @psi.) to the above tests, we could offer you a better educated answers. Forget all the tests I gave you earlier, just these last three (3) is what I am interested at the moment. Thanks.
Tony