turned fast and motor died

[randyswelding]

howdy again,last night i went crusin and was fallowin a riced up honda when he went around a corner and i had to fallow him,i had plenty of room to stop,but i had around 20psi of boost and let off and went around the turn and the motor died.this is the first time for that(it did it one other time but i know why,a large deep water puddle at the highway exit flooded out the air filter and got a lot of water in the turbo,but i did see really cool egtsthen after sittin for a little it fired right back up,so with that i figured alot of water goin threw the turbo isnt good)!i pulled over and a friend had spot lights on his new cummins and craked 2 injecter lines and pushed the lift pump button to see if i had fuel and i did,then took off the air filter tube to look at the compresser wheel and it look fine still,then tried startin it again and it fired up and missed a bit then rebleed those same 2 lines and it smoothed out.what did i do?it has me and a few friends and my dad confused!thanks for any ideas

[1991cummins]

i had a problem similar to that, i am a little confused on what exactly happened in your story??? but is it possible that your fuel shut off sylonoid is not makin god contact.

mine would be fine cruisin, but if i punched it or braked real hard, or hi a rough set of bumps it would try to die, or die... anything that would make it lose contact for just a second would kill it if i didnt let off the throttle and get back on it...

check those to make sure their not worn, and give it a scrape with a wire brush, maybe put new connectors on.

[randyswelding]

did yours have a hard time startin again?i did gut the shut off sylinoid?whats confusing so i can try to explain it better.

[randyswelding]

nope aint the shut off sylinoid i disconected it and it still fired right up.last night after it died it cranked but no fire,then i took off the asa intake tube ,opened #2 and 3 injecter line and didnt get any fuel when i was pressing the lift pump button.then i reclosed the lines then reprimed it and cranked then fired. today its fireing right up on the first crank every time and ive started it about 3 to 4 times

[1991cummins]

wait, when the truck died on you, were you getting fuel when you bled the lines, or was it pumping air? thats what im confused on...

i dont really know what else to tell you then, its above my head randy... sorry

is there any way that you could be getting inconsistent fuel delivery... cause i have a tank flipping switch that i need to disable cause i only have one tank... and if that thing gets flipped for just a second the old girl gets all p-d off and doesn't act nice... only happened a couple times, never completely died though...

[Begle1]

So the first time it happened, it was because you sucked in a bunch of water.

But this time, no water was involved.

This time, you were under a good amount of throttle (20 PSI of boost), then you braked heavily to go around a corner, and after the heavyy braking the truck died.

You cracked a couple lines after it stalled. Did you have fuel in those lines immediately, or did you have to prime them first?

Do you have a fuel pressure gauge?

What RPM do you have idle set at?

How much gas did you have in the tank at the time?

Does your fuel shut-off solenoid work to turn off the vehicle? Is there still a plunger in it? Are you running the truck with the shut-off solenoid plugged in?

[randyswelding]

no pressure gauge yet,tank full,when craked the lines after she died no fuel came out,it does have a new pistion lift pump(low pressure),idal is around 700 to 750rpm,shut off syl. gutted i do still have the wires hooked up,when i primed it i didnt get any fuel but we really didnt have a good way to prime it consistantly(trucks passanger side was in a ditch and driver side on the road still so it was hard to reach),but when it did kick over it ran at a low idal around 650rpm.i hope i answered all the questions

[Begle1]

Alright, my line of thought makes me think it's one of three problems.


First option, it's an intermittent open in the shut-off solenoid circuit. Typically, you would verify that problem by checking for voltage to the solenoid with the ignition while it wasn't starting. Typically, the solenoid needs voltage for the vehicle to run.
Now, you say something about your fuel solenoid not working as-usual, so I don't know how it applies to you, but it should have voltage if the plunger is installed.

Second option, it's an intermittent suction-side air leak, or an intermittent suction-side restriction. Like, a faulty fitting that is opening up when the frame flexs, or a soft rubber line that is sucking shut under acceleration or after driving for a certain amount of time. In my experience, if nothing is obvious, suction side air leaks are best fixed by replacing everything from the tank to the pump with a new line... How else can you know, right?

And the best way to bleed an injector is to crack the injector, then to crank the engine until fuel comes out of that line, then to close the line. The bleeder lever/ button on the lift pump only primes up to the injection pump. (It might put fuel to whatever injector the distributer is lined up to as well, I don't know about that though... It seems that's how it worked for me before, anyways.)

Third option, it's a bad injection pump. I don't know enough about injection pumps to tell you what specifically causes intermittent stalling and loss of prime, but I know that I had the problems severely, and that they persisted even after I replaced all the lines, the lift pump and the filter; rebuilding the injection pump fixed the problem entirely.

[randyswelding]

i like number 3 .it hasnt done it yet again and the plunger is out of the sylinoid,i do know that the turbo is dieing and the motor doesnt sound too healthy good thing i got another one coming to rebuild it this winter,and it has a pump too that i can figure out to rebuild

[randyswelding]

i like number 3 .it hasnt done it yet again and the plunger is out of the sylinoid,i do know that the turbo is dieing and the motor doesnt sound too healthy good thing i got another one coming to rebuild it this winter,and it has a pump too that i can figure out to rebuild