96 12v cummins wont stay running...
#1
96 12v cummins wont stay running...
Hello, let me start off by saying Ive owned this truck (1996 2500 12 valve cummins) for two months and I have never owned a diesel before. One day I went to leave work and with no prior signs my truck started up ran rough for a min or so then died. I changed my fuel filter and did not fill it with fuel first and used the primer button but nothing would pump into the filter. Finally I bought fuel and topped off the filter and reattached it, still wouldn't start. Had it towed home. Now at home Ive been fooling around with it and so far I have dropped the pre-filter and cleaned it out and put new fuel in it, put 4 gallons in my tank and removed the fuel filter and pumped the primer and now fuel comes out. So I put the filter back on and didn't tighten it all the way down and primed it until fuel spilled over then I tightened it back down primed the lift pump more and it fired up! However it only will run for a few mins then dies, I have repeated the process of cracking the fuel filter and letting air hiss out and re-priming and tightening it back down and then priming some more and it will fire up again, I have done this now 4 times and my little thumbs are killing me from priming so much. Any ideas of what could be going on?!?!?! Please any advice is helpful and thanks in advance.
#4
#7
Depends on you're experience. Honestly, it's a royal PITA, but you can do it with basic hand tools and some patience. Obviously a lift makes it about 1,000x easier, but it isn't necessary, and it's still a PITA. My advice, (if it's 4WD) disconnect the front drive shaft from the pumpkin and swing it out of the way. Take out the starter. You can do it all from the bottom, but when you're trying to get all the holes lined up to install the new one between the bolts, pump flange, heater plate and two gaskets, you'll probably want more than one angle of attack to keep the stress down. In which case, you may want to remove the fuel filter too.
#8
Does it matter if my pre heater electrical lines have corroded away from the heater part on the top of the pre filter? That's another thing I discovered while pulling and cleaning the pre filter. A diesel mechanic i know seems to think it will run fine without the wire harness hooked up to the pre filter.