Hi guys. Excuse me for butting in. 0 Volts on the green / orange wire means the automatic shutdown relay isn't turning the 12 volts on during cranking. That's not the same as that circuit being shorted. There's injectors, ignition coil(s), oxygen sensor heaters, alternator field, and fuel pump or pump relay on that circuit so it is going to read almost 0 ohms to ground.
The fuel pump will only run for one second after you turn on the ignition switch. That's why you're seeing some pressure. You'll find the 12 volts at the injectors too for that one second. When it doesn't come back during cranking, the crankshaft position sensor IS the most common cause but on the V-6 you're more likely to need a new distributor. The camshaft position sensor is in the distributor. The Engine Computer has to see both signals during cranking to turn the ASD relay on.
You also have to consider a jumped timing belt. If it jumps one tooth, the Check Engine light will turn on and a diagnostic fault code "cam and crank sync" will be set. If it jumps two teeth, the computer will shut the engine down to protect the valves.
Saturday, March 31st, 2012 AT 3:44 AM