im not sure what it means either, never heard that term. like i said i think your looking at an IDM or PCM, lets hope not haha

 

.26 volts in run .44 volts starting from the idm enable output from the pcm

 

is this what you got or what it should be?

---AutoMerged DoublePost---

would you have access to a buddies truck with an IDM you can try for ha ha's? just to eliminate that? or a pcm with the same 4-digit code at the connector?

 

thats what i got and theres no way that could be enough. i have both of them in ny and so does he but the problem is getting them

 

today we'll try and get both batteries load tested and see if light duty diesel dept. can help us out on borrowing a pcm and/or idm. right now my take on the situation is this...the first issue was most likely idm related whether it be the relay or the unit is anybodys guess at the moment but that search cant go anywhere until i know if that pcm is functioning correctly. from the sounds of it it's not. right now im guessing he left the key on or something and at one point when we hooked up the jump pack for testing it toasted it.

 

my thoughts exactly

a good possibility is the IDM was doing something it wasnt supposed to do (going bad) and in turn it spread to the pcm. worst case scenario is you have both bad. but get your batteries charged and tested, and keep us updated

 

i have another question on diagnosis which i believe might make or break my diagnosis. is it safe with a volt meter to test the voltage to the injectors in the injector harness by unplugging one and probing it? second question will it work? i care more about if its completely safe more than will it work. my volt meter has a high range of voltage so i dont think it'd have a problem with the 115v but that number bothers me a bit so i figured id check before i just go ahead and poke at 115v

 

alright, i dont recommend this but yes it can be done. but DO NOT stab the wire in the back of the connector. unplug the harness at the injector under the valve cover and just touch your leads on the pins in the connector. DO NOT CROSS THEM BY ANY MEANS! and be careful, if you get shocked your not gonna know what hit ya, probably wont know your name for a couple minutes. you should see anywhere from 90-120V, thats your actuating range.

but i dont think your gonna be able to catch it with your meter because of how fast the injection event happens, you'd be better off using an ocilliscope where you can graph it in different time frames, or a laptop with a breakout harness that can watch injector voltage patterns.

but on the other hand, if your injectors were getting voltage, your hpop is good, and your lift pump is good, and granted your IPR is functioning properly and your cam sensor, the truck should start. from what we've diagnosed so far, i dont think your idm is doing anything.

 

thats where i'm going with it. right now were working on getting the pcm and his other idm which he thinks is probably shot due to water but its worth a shot just in case. hopefully those get shipped down quick. the pcm will go in first and we'll go from there because with the voltage to the idm relay and no power at the connectors theres no way the idm can even try to function right now with the pcm in this shape.

 

like i said earlier, if your pcm is shot your IDM isnt gonna do anything. but yea try the pcm first see what happens!