12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

96 12v cummins wont stay running...

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  #11  
Old 07-13-2014, 05:12 PM
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I wouldn't delete it, not in Michigan...
 
  #12  
Old 07-16-2014, 07:48 PM
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Just a update, I pulled the lift pump in less than 20 mins. I just pulled the tire off and pulled the wheel well cover out and accessed it through there. needless to say I won't have the new lift pump until Monday. Not even sure it wasn't the lift pump in the first place because the gasket is totally gone. I suspect it was leaking through where the gasket was supposed to be. On a side note is the fuel heater part of the system where you plug the tuck in to your houses electrical to keep it warm in the winter?
 
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Old 07-16-2014, 08:17 PM
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No that is a block heater, the fuel heater is the plastic portion to the left of your fuel pump. It is sandwiched in between two metal sections and had a two wire connection coming out of it. They are well known for being a source of air leaking into the fuel system on these trucks.
 
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Old 07-16-2014, 08:38 PM
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How do you delete the fuel heater
 
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Old 07-17-2014, 11:20 AM
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pull the fuel bowl off the Lift pump, remove the hex bolt from heater section and screw the fuel bowl back on ... unplug the heater section from the wiring @ connector... Deleted complete..
 
  #16  
Old 07-18-2014, 11:27 PM
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Update: I received the new pump today...it is about a hundred times more difficult to install this than to remove it. I finally got it all mounted and installed, up until reconnecting the rubber house from the fuel heater/pre filter...it kinks now and I cut a little of the line off and it still kinks and won't fit on all the way now...what seemed like the easiest thing to do is now holding me up from completing the job. I hope when this is all said and done that this is the problem in the first place!
 
  #17  
Old 07-19-2014, 12:25 AM
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Replace it with BIO_fuel grade line .. Gates makes Bio-Guard .. 2.39 a foot @ car Quest
 
  #18  
Old 07-19-2014, 12:18 PM
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Ok, I went to carquest this morning and had them cut me a foot of new hose. When I cut it to length and put it on, it still kinks...My question is what purpose does that hose serve? Is that the hose that fuel is sucked through when I am pushing the primer button, does it all start at the pre filter then is pulled through that hose and into my lift pump then pumped up to my fuel filter? Also would it be ok if I used more than a foot possibly two feet and loop it around to prevent it from kinking? Kind of making a long loop to drop down a little and connect the pre filter to the lift pump is what I plan on doing.
 
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Old 07-19-2014, 03:59 PM
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Ok i got a longer hose and she's all hooked up now, but I've been priming and priming but nothing is coming up to the fuel filter. I've pressed the primer over a hundred times and i tried cranking it over but no luck, i even cracked the fuel filter and a fuel line still nothing....HELP!
 
  #20  
Old 07-19-2014, 05:11 PM
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Well that's odd.

Actually, if you're being literal it isn't. When I change my filter I count pumps. Don't know why. OCD tendencies? Eccentric stupidity? Don't know. Moral is: 100 pumps is never enough, and I don't completely drain the canister. I'm usually closer to 200 before I get fuel out the top (I have a little ball valve on the return line on the filter housing I open to know when it's full). Regardless, I'd say crack the feed line on the LP and see if it's pulling anything. I find it very hard to believe in the possibility of a bad LP right out of the box, but it's a pretty simple system and there's only so many parts between the tank and the filter.
 


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