I have done the searches here and other forums and I am wits end. The engine is rebuilt and ran fine for over a year but as of couple of weeks ago it just doesn't start, cranks I can hear the fuel pump but no turn over, battery is fully charged. I have replaced the cam and crank sensor also the ECU and still nothing. What can it be? I went to one shop and he was saying that it can be the headgasket but I haven't seen the "chocolate milk" in the coolant. Could it be the ASD or the battery wires? Need help please thanks guys.

Start with the simple things before you start replacing parts. Do a compression test. Pull a spark plug and check for spark.

I found out it was a busted fuel line.

There you go. When I'm stuck troubleshooting a no-start, I remember that internal combustion engines need three things to run: fuel, spark, and compression. Checking for problems with each of these will point you in the right direction.

This was a tricky one but glad I worked it out.