help!!!! No start!

[dmnknightomega6]

Sorry for a late resurrection of this thread.

So here is what we tried so Far:

Replaced coolant Sensor
Sprayed Starter fluid. (smelled Fluid on the tailpipe after)

I really think is its a sensor.

Since we have coilpacks, how do I test for spark?
What / Which Sensor can Cause a no start, and How can i test it with a voltmeter?

I would really hate taking this to a dealer....

Thanks in Advance