For no start conditions you need to rule out some systems. I would check for spark. Get a spark tester from any automotive tool supplier and test or you could use a screw driver inserted into the spark plug boot and held close to the engine with someone trying to start the engine (**Take care to get electrocuted if using a screw driver). Crank the engine for about 15 sec and make sure your getting spark consistently through out those 15 sec.
If the ignition systems if proving out good
Next, check for fuel pressure with a fuel pressure gauge. 3.1l engine fuel pressure 41-47 psi 3.8l engine fuel pressure is 48-55psi. If this is good, next you'll test for engine timing and then compression. Hope this helps and good luck. If you have any questions let me know, Ty
Wednesday, September 4th, 2013 AT 9:14 PM