Injector problem?

[wingate457]

I FINALLY put my motor back in my truck. just pulled the LLY to do headstuds after leaking coolant for weeks. Got everything back together and started right up. Runs extremely rough, shakes and sputters. Checked and number 4 injector was not even functioning. Replaced that and it sounded a bit better. Drove it about 100ft and started dumping white smoke and sputtering even worse. Any ideas? I am sure its an injector issue just not sure exactly what

 

[mudder500]

make sure the connections are nice and tight. Also Fuel lines.

 

[JD4440]

Any codes ? Check and recheck everything. Mainly injector lines and return lines, ect.

 

[05lly2500hd]

try idling it and pull off injector connectors one at a time, when you find the one that doesn't make a difference, that's the problematic one. Is your harness ok? LLY have #2 and #7 electrical connector problems with them not making good contact...