James;
To begin to diagnose the cause of the no-start problem you are experiencing, you will need access to some very basic test equipment, such as a fuel pressure gauge set, compression gauge set, DVOM, spark tester,and logic probe. A scan tool capable of reading live powertrain data on this vehicle may be required as well.
To begin with, you will need to determine whether the engine does not have spark, fuel supply, fuel injector pulse, or compression. One of these things is missing if the engine will not start.
Check for spark; if you have good spark, then you know the crankshaft position sensor and ignition system are operating OK.
Measure fuel pressure and compare to specs; if the fuel pressure and/ or volume are significantly out of spes the engine will not start, or may momentarily start and then die.
If fuel pressure, volume, and spark seem OK, check with the logic probe or a noisd light for ground pulse at the injectors, and also use the DVOM to be sure you have full battery voltage to the injector positive sides. You may also want to use the DVOM to verify that computer reference voltage is at 5 volts at the sensor reference circuits; if you have a faulty sensor or wiring harness problem somewhere it may be pulling TPS, CkP, MAP, or other sensors to ground resulting in no input to the PCM.
If all of the above check out OK, checking engine compression to verify mechanical integrity (to rule out a jumped timing belt, for example) as a cause.
If you still have not determined the system that the fault is in, the next step would be to connect a scan tool to check for fault codes related to the no-start, and to get a look at what data the cvarious electronics in the vehicle are sending to the powertrain controller; as well as to check for communication bus problems.
I hope this is helpful; if so, an accept would be most appreciated! thanks!