Lift Pump FYI

[CumminsAholic]

Just to let you guys know... . The lift pump went out on our 89. It has always started good, but now that it got cold it'd start, idle for 15 sec and die then not even fire... Pull it in the shop, did a big no no... starting fluid, and it finally started. I thought it was maybe a fuel filter, but after changing that it still did the same thing, start idle for 15 sec then die and not start, only when it was cold. I took off the lift/transfer pump and that was it, the shaft wasn't connected to the rod anymore. Went to cummins and got a new one, bolted it on and now I hate to say this, but you all know it's true anyways, it starts better than dad's 98 and my 98. 5. I can't believe that the 1st gen trucks can only turn over half a turn and already be fired up. Gotta like that. So if you're having a hard starting problem, check out the lift pump. It started in the summer, but the fuel must have been too thick to start in the cold we've been having. I'm kinda disappointed, it only lasted 350k... unlike my 24v that lasted a whopping 45k. Nothing like technology moving backwards.

Corey

 

[Gumby79]

Jelled of LP?

Hoping to shair in your rejoice . My 91.5 fired when bumping the key doing a valve adjustment this last spring 310k now 350k ish(odo failed). Now yester day it fired kinda lousy ran 60-90sec then stall. First thought was jelled fule . Last station filled at in UT had a sign said winterised. (Maby not low enough temp for Montana when cut with 17ga NV#2) So I put in 20oz of wight (winter) Diesel Kleen with ~20ga of UT spec winter fule 17 ga from Las Vegas Nv . Day 1 home 5°f low start no problem. And day 2 fired a little stubern ran 1 min or so fine alittle slow with the oil psi but not ruff or grumbly /smoky like i have evry once and awhile , indacating Im on the verge of to cold for non blockheater starts causing 1-2 cylinders to not fire till up to temp.(it was off but not temper tantrum off) Then stall.
Cranks over just fine plenty fast. No smoke of any kind .
Whats making me think pump not jell
Clue#1 So when i check the water seperator it sucked in more air than fuel came out, no water or ice in fuel. . Suction on HP side of LP.
#2Then unscrwed the filter down .5" and cranked . Noda drop. Then pulled the filter all together, not a drop. So at this point my question is would the LP flow jelled fuel to the filter ,were the filter is the restriction, or would it not pull from the tank with 39°/12°f and 25°/3°f H/L and
#3. 60ga worth of anti jell.
Ill know in 3 days but pice of mind for those 3 would be nice.
#4 1year ago when doing up the fuel filter the priming lever was inop. Bumped the motor to move the cam. No dice so cranked it to fill the filter then bleed the lines wala. today i bump over the cam to make reinstall Easier the handle is floppy /attached but just wrong. I can fill the resistance from the spring but still no fuel noew the handle flops so bad that the detent will not hold it up in service position. Indacating I may have snaped the fulcrom rod like you.