1999 Plymouth Neon Will not Start at all

To determine if its fuel or spark related do below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it

Thank you for your promt reply about my daughters car - 1999 Plymouth neon.

We did all of what you suggested, no blue sparks, and my husband put on a new coil- still no starting.

The engine turns over and over but no start.
He also replaced the intake manifold, put new plugs and wires, a new coil, and still no start.

Any and all suggestions would be helpful.

Thank you, Kathy

Okay -now check the camshaft and crankshaft positioning sensors-