Sorry for taking so long to get back to you guys about this machine, but it still has the same hard starting issue. I did finally get around to checking for parasitic hydraulic loads and the test was good. I also checked the exhaust temps with a thermal imager and it all seemed to heat up evenly between the cylinders and the temps for each cylinder seemed to climb and even out about the same with 1 & 5 being around 415 degrees, 2 & 4 were a little higher and 5 was a little higher. Didn't really see anything that stood out as a problem. As far as the thought of the fuel issue goes I have already put a seal kit in the filter base and checked for fuel bleed back. It will hold 4-5 psi for a couple weeks on a mechanical gauge and will build upwards of 30 psi after about 2 seconds of cranking. Also the timing sensors are the same and they have been changed out twice, once by me and once by the dealer. I have 4 spare sensors that all test the same. If I swap the harness ends it does change the code from 636.10 to 637.10 and I have swapped sensors and it still has the same code that's why I had thought it may be a timing issue with the tone wheels, and that's why I took it to the dealer to have it checked. They said the timing was perfectly fine. Weather or not they actually checked it I don't know, but I did pry around with a small screw driver on the tone wheels and they didn't seem to move either. I'm going to try to borrow the tools from them to check the timing myself if they let me. Any other ideas? I'm all ears.
Thanks.