Hello All. Thanks in advance for any input. I can even handle take it to a professional comments but I just don't give up easy. I'm new to the diesel world for just a year now. I have a 2008 dodge 6.7 for myself but the truck I am working on is my girlfriends 2007 dodge 5.9 4 x 4 four door 3500. She was hauling a light load and it starting running rough and died. Restarted and ran fine then 30 minutes later it died and hasn't started since. Since boyfriend duties require me to try here I am in this pickle. Now for what I've done. tested lift pump output, injection pump output, injector return flow, and verified fuel psi vs fuel setpoint while cranking and all seems perfect. Will not start with minor shot of starting fluid but sounds like it tries. I've unhook fan wiring still no start. But here's the weird part to me. I unhooked the crank sensor and it started. Ran horrible, missing and knocking so I shut it off immediately. Done the cps circuit test and everything ohms as it should. Replaced the sensor just because it wasn't too costly. Done the same circuit testing for the camshaft sensor which is identical as the crank sensor on this truck. I'm thinking I have an electrical short or bad ecm but wanted some wiser than myself input. One thing that doesn't seem right to me is if I pull the ecm fuse I actually have 12 plus volts on both sides of the terminals. The hot side has about 1/2 volt more than what I would call the load side. May not mean anything but when I pulled that same fuse on my 2008 I just had battery voltage on hot side and nothing on the load side. So what do you think I should test or try next?
Hello All. Thanks in advance for any input. I can even handle take it to a professional comments but I just don't give up easy. I'm new to the diesel world for just a year now. I have a 2008 dodge 6.7 for myself but the truck I am working on is my girlfriends 2007 dodge 5.9 4 x 4 four door 3500. She was hauling a light load and it starting running rough and died. Restarted and ran fine then 30 minutes later it died and hasn't started since. Since boyfriend duties require me to try here I am in this pickle. Now for what I've done. tested lift pump output, injection pump output, injector return flow, and verified fuel psi vs fuel setpoint while cranking and all seems perfect. Will not start with minor shot of starting fluid but sounds like it tries. I've unhook fan wiring still no start. But here's the weird part to me. I unhooked the crank sensor and it started. Ran horrible, missing and knocking so I shut it off immediately. Done the cps circuit test and everything ohms as it should. Replaced the sensor just because it wasn't too costly. Done the same circuit testing for the camshaft sensor which is identical as the crank sensor on this truck. I'm thinking I have an electrical short or bad ecm but wanted some wiser than myself input. One thing that doesn't seem right to me is if I pull the ecm fuse I actually have 12 plus volts on both sides of the terminals. The hot side has about 1/2 volt more than what I would call the load side. May not mean anything but when I pulled that same fuse on my 2008 I just had battery voltage on hot side and nothing on the load side. So what do you think I should test or try next?