OK 7.3 fans... I need some suggestions. I have a pristine 2001 dually that won't start. Since I use it to pull my fifth wheel camper, I added some new suspension and brake components. Also added a Banks Powerpack system, 6.0 trans cooler and a coolant filter. And as long as I had much of the front disassembled, I thought I'd also do a thorough cleaning, change the engine oil, trans fluid, brake fluid and coolant. To make the engine compartment easier to clean, I removed the main harness as well as many other parts. Being an engineer and used to doing this kind of thing, I labeled everything and am "confident" that everything is back where it should be. Also added 2 new batteries. Today I tried to start it. No go. Everything else seems to work fine. I've rechecked all the connectors, grounds, fuel flow etc. All seem good. I plan to call the tech guys - maybe they have some suggestions. Anybody have any suggestions??? It's driving me NUTS!