If you have spark (properly timed), the crank sensor is fine.
The PCM uses the cam sensor to control injector timing - that is, to synchronize the injectors with the spark for each cylinder.
To check for a faulty cam sensor, just disconnect it. The PCM will detect this and will "guess" the injector timing. It will have a one-of-three chance on any attempt of being correct. Usually within three attempts, the engine will start. If it guessed wrong, you will get bucking or backfiring.
If there is still no evidence of firing and you have positively confirmed proper spark, remove the hose from the throttle body and give it a shot of starting fluid while cranking. If it then fires, you know you're not getting fuel through the injectors.
All six injectors share a common power source through the PCM power relay. This same power line also runs to the VSS, IMRC, IAC, MAF, ICM, and more. If your CEL comes on during bulb prove-out, this power line is good to the PCM. If you can get to the injector connector plugs, it would be helpful if you can verify that power is present there.
If the engine started only with the starting fluid, you have power to the injectors, and disconnecting the cam sensor made no difference, I would suspect a faulty PCM or perhaps a short to ground on the Vref (+5V) power line (check that at the TPS).
Steve
