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Truck only fires up when plugged in or warm

1009 Views 5 Replies 5 Participants Last post by  steelhead01, 
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Hey guys. Friends 03 5.9. He took it to the dealership for a no-start condition about 3 weeks ago. They diagnosed #2 injector and lift pump. We than replaced the single injector and lift pump with a new one.

Now, about 2 weeks later the truck will only fire up if it is plugged in for a few hours or after it has been ran and warmed up. The injector was installed exactly to spec, with the torque procedure and everything. It does not seem to have any smoke at all, or run rough once it runs.

The temps here are only about -10C or 14F.

Any ideas or how to go along testing anything? The only codes stored are for the fan clutch, which is totally un-related. Thanks guys!
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rpage, that is personally my opinion as well. I will look into a flow return test and get right on that. I know in my 03, I dont even have to let the Grid heater cycle at 0 and it will still fire right up no questions asked.

Giddyup5.9 - I am not 100% sure. You can hear the relay/solenoid click when you turn it on, but what I think I need to do is check for power right at the grid heater when warming it to see what happens.
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