I did the dummy plugs, standpipes and stc fitting on my 2005 6.0 after a hot, no start issue. Started her up, let it run for a bit and took it for a good long ride; about 40 minutes including some highway time. I am getting a long crank now but she does start eventually. I know a long crank after doing this work is normal but after a good run too?

 

Was it a good run with a lot of flooring when the engine was up to temp (190)?

If not, you're going to have that problem

 

A long crank is considered to be more than 30 seconds. You need some WOT runs to flush the air out. If that doesn't solve, maybe an air test is in order to verify no injector o-ring leaks? Did you air test after the work?

 

A lot of traffic around here so I am not sure I was able to truly open her up. Crank is around 30 seconds or so. I do stop cranking before she starts some times as I don't want to burn up the starter. I did not air test.

 

take it out for some runs after it gets up to temp... then report back with how long the rubber marks are... or pictures even better

 

3-4 medium to hard throttle runs at operating temperature should be sufficient to get the air out of the HPO system after your repair. If you're still having long cranks after that you possibly still have a leak. I consider 30 seconds to be an extremely long crank under any circumstances.

 

What Timbo said.....

 

Took it out for another run and still have a long crank. Is this the fitting I need to air test the system? Search results for: '303-765-766'

 

On an '05 You can start with an ICP port test. A lot of times a good leak will show up pretty quickly with this test. You can assemble an ICP tester for about $20. An IPR test port plug is the best way (HHC Diesel or ebay) but not everyone wants to jump in that deep right away:

This is an ollllld video but the parts for the tester are in there and linked in description:

 

It took me 3 or 4 days of driving to get all the air out. Long cranks during that time. After she fires up anywhere from half to 2 seconds of cranking. Probably less as I am just guessing and cranking seems to slow down the time continuem as even 2 seconds feels like an eternity.

It has been 8 days since your OP. If you have been driving it and still have long cranks then you may start looking deeper. I hope your cranks are short by now.

 

I've taken the truck on 3 40 minute rides since the original post. I haven't sent it out other than that. Would air in the system cause long cranks only when hot? It starts normally when cold.

 

If STC fitting is done and still hot start issues you have a nipple cup seal leak.
https://www.ford-trucks.com/forums/1...ole-story.html

 

Or you have a standpipe or dummy plug issue. Just saw where you did them. Trash in your IPR screen?