2001 Ford F-350 Fuel/electrical

RKH8772

MEMBER
2001 FORD F-350
130,000 MILES

I was driving my 7.3 diesel truck around town and it seemed like I was running out of gas- lack of power and starting to misfire. I was low on fuel, but light was not on. Drove 1/2 mile to station and put in1/2 tank. I started the 2 miles home and truck stopped while going up neighborhood hill. Gt a tow home and replaced fuel filter/water separator. Truck ran for about a minute, then stopped, misfiring all the time. I tried to start it a couple times, but it would not start. After sitting overnight, the battery's so dead that the door locks won't even work. No lights were on to obviously drain battery. I was going to try and troubleshoot tonight so any thoughts on where to start would be most appreciated.

2 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Start by charging the battery. Low voltage will cause all kinds of issues

Roy

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Monday, October 28th, 2013 AT 6:23 PM

RKH8772

MEMBER
2 POSTS

It's not the battery. I troubleshooted a little last night and have about a 14 amp (not milliamps) parasitic draw through circuit/fuse 20, which is the ignition (B4&B5). To find that, I completely disconnected one battery and the ground from the other, then checked for current between the disconnected ground cable and post and started pulling fuses until I found what circuit the current was through. I can't help but think the two are somehow related, but I expected it to be through the fuel pump relay circuit, since it had symptoms similar to running out of gas although I have never run out in a diesel before. I'm guessing something failed, with a motor etc. Stuck on, so that it's drawing current through the ignition circuit, figuring it could be almost anything that kicks on with the key.