Hi everyone. I have a 2005 4.2 supercharged that cranks but won't start (tries to fire very intermittently) and when I direct wire the fuel pump I can hear a whirring for about 1 or 2 seconds but then nothing so not sure if it's the pump giving up or not. I have a fuel pressure gauge but can't see where the valve is to connect it! Can someone please put me out of my misery. I have searched the internet and the manuals I have found but cannot find a schematic nor actual picture. It's very frustrating because until I check the pressure I can't move on to other checks. My thanks to all.