[avgtiger]

i have a 01 ram 2500 with 350k miles.
engine starts, and immediately cuts off. i have to crank and crank and crank, and it finally starts again. i have to crank so long sometimes the batteries die, and i am afraid i will burn up the starter. i can't find any voltage at the intake pre-heater. (i may be checking wrong) i am putting my pos lead on the lug at the intake heater, and the neg probe i am grounding to an exhaust bolt that is not painted. i get 0 voltage, and when i check battery voltage i get about 13v. Being that i live in Florida, where it's still in the high eighties, would it even make a difference if the pre-heater is not working?

 

[BFD]

The intake temperature is probably too warm for the heater to come on and it should start easily at 80°. Check the lift pump pressure. I never had a 24V CTD and VP44. I always made up my own fittings and used a text gauge just long enough to check the fuel pressure.

 

[bigfish95971]

Grid heater operation or not means nothing in Florida, not needed at all. And failure does not affect starting or running.
Check fuel pressure, WTS light operation, Battery cables etc.