I highlighted what I've verified to work, or doesn't seem to exist.
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Originally Posted by landrovered
Well the immobilizer error code may be more important than you are currently ranking it in your troubleshooting.
Start sequence (not porsche specific) is pretty simple.
Power, ignition switch, inertia switch, immobilizer, fuel pump fuse, fuel pump relay, fuel pump, MAF reading, fuel temperature sensor, coolant temp sensor, throttle position sensor, crank position sensor, cam position sensor, energize coil packs, starter motor, start.
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No one seems to be sure what the immobiliser signal does, but the consensus thinks it diables the fuel pump, ignition, and injectors. I can't help but think the immobiliser code would disable the starter. The immobiliser is part of the alarm module, and the alarm module disables so much of the car. When it's removed you lose interior lights, starter, window control, and of course both remote and local locks. Removing the alarm module disables the starter so why wouldn't that be part of the immobiliser? Since all of those other alarm module functions work and the module is in pristine condition, I find it unlikely that this is the source of the error. In addition, the car ran, very poorly, but continued to run for several minutes after I started losing power. I think if it was something on the alarm module it would have died hard and not even cranked.
This all happened after I filled the tank from almost empty in the rain. It's not water in the gas, and it doesn't appear to be water in the alarm module, so I'm back to it being a fuel delivery problem. I sucked up a frog or something.