X5 stalled/set codes while being inspected!

[workingonit]

Originally Posted by 80stech

You really should do a fuel proper fuel pressure test before you go replacing a bunch of fuel system parts and fuel. Did you ever check the line from the pressure regulator going into the intake boot F connector ?

I didn't. It was the next test I was going to try, on the last day I worked on it (before my OEM key didn't work, side-tracking me towards getting a reliable Valet key).

I was first hooking up my fuel pressure gauge, using a long hose from the Schrader to the gauge, and then taping it to the windshield, so I could observe the fuel pressure when going around corners, but the gauge failed and/or the Schrader/fuel rail got plugged-up, hence zero fuel pressure and no fuel out the release valve. I bought a new gauge, and decided to amend my repair plan. Haven't tried anything but the Valet key, since.

If the vacuum hose to the F-connector has a leak, or is semi-plugged, would that cause a rich fuel trim? I plan to replace the vacuum hose when I replace the filter/FPR.