Quote:
Originally Posted by PeteKz
Did this problem occur suddenly, or did it get worse gradually? Don't mess with the sensor plate yet. That will upset your other troubleshooting. If you think you are losing residual pressure, find that first.
I wasn't clear how you measured the pressures. The standard procedure is to install your gauge/valve setup between the FD and the WUR, with the valve towards the WUR, not the FD.
What is the System pressure with the FP running (valve closed)? What is the warm Control Pressure (WCP) with the FP running (valve open)? Then turn off the FP and read how long it holds residual pressure (RP). Don't just stop at 15 minutes, but keep tracking it at least 30 minutes, preferably an hour.
When the car is hard to start (and I will make the distinction here that it IS cranking normally, just not firing--correct?) spray starting fluid in the intake. If it starts right up, then you are not getting fuel. This rules out ignition problems.
What is the number on your WUR?
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WUR is an 006 model
I installed the gauge first between FP and Accumulator to test pump, closed valve, it held pressure 88 PSI for 15 minutes when I stopped the test
Then I installed the gauge between accumulator and FD, turn on pump for 10 sec, close valve. It was holding at 27 PSI at 15 minutes when I stopped the test which should be fine I believe.
Then I moved the gauge to the normal testing position as you mentioned, valve on the WUR side. Turn on the pump with valve open (so WUR is included in the test ), turn it off and it loses pressure in about 1 minute.
After that I turn the pump on again,closed the valve so the WUR shouldn’t be included, and it still loses pressure , which makes me think the FD is possibly leaking between supply and return?