Hello, this is my first post so I will start by saying sorry in case I forget any pertinent info in the beginning. I have a 2008 6.4 that cranks over but won't start. We installed an Air Dog II fuel system, put everything back together and it started fine, heard a knocking sound but nothing drastic. Sat idle for approx 15 minutes, backed out of the shop and then started driving down the road. Went about 100 yards truck acted like it was out of fuel and died. Have not been able to get it started since. Someone please help, this truck has easily cost me over $70,000, it has broken my bank account, my heart and almost my marriage.
It has been scanned for codes with the Spartan tuner and a VCM scan tool. No codes are showing up. PCM has been reprogrammed to stock, no change.
The following is a list of parts we have changed since having the problem and a list of things we know to be true:
Injector #7 (was stuck open)
All new glow plugs
Glow plug harness
Glow plug module
High pressure fuel pump
New rings and fuel lines for injectors
Batteries are good
Fuel is present throughout the system
Coolant and oil levels are good
When trying to "jump" security system from passenger battery it still wont start.
Using VCM scan tool all systems pass test ie: injector self test, PCM test, TCM test, instrument cluster, etc.
Fuel reset switch on pass side has been checked and flipped multiple times
Fuses and connections have been checked multiple times.
Any ideas at all would be very helpful. Thanks in advance.