I have a 1994 F350 4x4 4DR with an E04D and a 351W. I pulled the engine and put GT40 heads, a GT cam, 1.7 roller rockers and longtube headers. I put the engine back in about 3 weeks ago. The truck had been running fine except for the exhaust leaks (sounds bad). Saturday night I let it idle while I was trying to pull the bed off using a chainhoist and a tree. After about 15 minutes the exhaust leak got worse and it started running really rough and then it just died. I started it up and I had to give it gas or it would die. Sunday it wouldn't start at all. I checked the schrader valve on the fuel rail and fuel shot out. I made sure the timing was correct. I checked spark using an inline spark tester [spark was present]. I replaced the coil and the TFI module anyway! I pulled a plug to check that it was sparking with my own eyes [it was sparkin]. Plug was brown and looked healthy.

The flex pipe that I have connecting the long tubes to the stock exhaust [temporary] came loose on 1 side. This explains the loud exhaust but could it make the truck not run?

If I have fuel and spark what else could it be. I loosened the dizzy and rotated while trying to start it [nothin]. Yes the rotor inside the dizzy is spinning. When I first started it 3 weeks ago I had open headers and it fired right up. I had all the vacuum plugged because I had broke my vacuum lines. All vacuum plugged when it died so I re-did the vacuum lines correctly hoping this would correct the problem....nothin

Maybe the fuel rail has pressure but the injectors are not sprayin? I am stumped!