Bob, what is the SCT fitting?

 

STC fitting, often confused with SCT (the programmer). It's the "snap to connect" fitting on the high pressure oil pump, it often cracks and leaks. It was an issue on the 05+ only. Look at the picture below, the little fitting that has the saying "discharge tube bolts" next to it is it. Ford released a new version that doesn't crack and fixes this issue, Tousley sells it for around $38 and should be updated any time anyone digs in on any 05+ truck (if it hasn't been done already). The P/N is 4C3Z-9B246-F

 

In reality the 03 and 04 trucks have 5 STC fittings but they are not prone to trouble, they were installed properly with all the force in-line with the fitting, what happened in 05 is they made it so the pressure was going 90 degrees from the fitting and that side-loading on the fitting is what causes them to fail.

 

How do u know when the stc fittings fail I have an 05 an want to be aware of the problem

 

Hard hot starts are the first sign. It's not "if" it will happen, it's more of a "when" it will happen.