2 thing here. 1 - you have a fuel leak down problem. Sitting for 3-4 days should not make the truck hard to start. 2 - You started probally has a high temp override and when you crank on it all day and all night, it is going to disengage to keep you from burning it up. Give it a shot of ether...

Possibly but the Cylinder leak down test says that the compression is going to the crankcase. Still getting 16% power output from the number 8 so I was kind of confused. That low compression should not be putting out that much power still.

Well, 2 days after dropping truck off at the dealer for diag, I guess I need to start looking at a new motor or truck one. Dealership run compression tests and informed me that #8 is dead and only providing 50 lbs of compression. I'm thinking just do a crate drop because of the horror stories...

I have a 2000 F250 with a 7.3 that has begun to give me more than a few problems. The motor is stock original with 395000 miles on it but has begun to have a hesitation and light tapping. Cannot determine if bad injector or dropped a cylinder. Truck gray smokes quite a bit at startup but once...