Engine/Transmission (1994 - 1998) engine died and wouldnt start

[love-horsepower]

i have a 98 12v stock injectors motor just rebuilt after 406,000 miles. two weeks ago ( it has been very cold here in des moines) i started the truck after i had been inside getting parts it ran then died i started it again and it died i thought maybe water in the filter drained it then pumped it full w/bleeder open till fuel came out closed bleeder pumped it a couple more times and heard something click inside the injection pump it started right up has worked flawlessly till today same thing started and died would not restart no mater what i did i even cracked injector nuts but now fuel or smoke spayed w-d40 in intake would run for a split second then die. pulled it a few blocks to my partners buisness left it for 2 hours came back it started and would not shut off. and ran at 38-3900 for 5 minutes had to pull my cardboard out of the radiator as it started to heat up. then i took the turbo hose conector off and put my hand over the intake and shut it down. i think the pump has been played with as it makes great power but i have no idea as to how or what. i know the injectors are stock as i replaced them and the shop said they were stock 170 hp injectors. is there something on the fuel plate that could have come lose to allow the fuel stop to not work and the accelerator pedal makes no diff. any help or advise is greatly appreciated. rod

 

[Mikey-KE7LBB]

Sounds like the fuel shut off solenoid is toast. A friend of mne had to use the mechanical shutdown on his 95 for about a week when it was stuck "on" until it just quit working all together and wouldn't start at all. He replaced it and hasn't had trouble since.
I have no clue as to why it would run wide open though...

 

[mfburns]

I agree with Mikey. Sounds like the fuel solenoid. It would not shut off. Solenoid stuck open. Would not start, solenoid stuck closed. I would look there first. There are many threads here about this issue. Do a search for the correct proceedure. Basically turn on the key and see if the solenoid opens. Turn the key off and see if it closes. I believe it is on the drivers side down below the fuel filter and a little forward.

 

[Skydiver]

I can't help you with the wide open. How much wd-40 did you spray? Did you possible saturate it? Did you hear any real loud knocking sounds?Any time someone sprays an engine it is best to have the starter motor running, then add the juice.
QUOTE from mfburns:Basically turn on the key and see if the solenoid opens. Turn the key off and see if it closes.
The starter must be engaged before the solenoid will pull up. After that it will remain up.
.
QUOTE: left it for 2 hours came back it started and would not shut off. and ran at 38-3900 for 5 minutes had to pull my cardboard out of the radiator as it started to heat up. then i took the turbo hose conector off and put my hand over the intake and shut it down.
Very dangerous. You are lucky it did not remove part of your hand. The vacuum alone can cause circulatory damage.

 

[love-horsepower]

engine died

th fuel solinoid is working it will start now and run wide open with fuel soiloid in the off position and no mater what you do i. e. pust throttle, turn key on off,move solinoid up down makes any change to shut it down i have to have hold my hand over the intake to shut off the air.

 

[GaryOwen]

The most common cause of a runaway is the seal in the turbo. If the seal goes the turbo can suck oil directly out of the oil pan into the intake. This will "collect" in the intercooler turning it into a reservoir of "fuel". This you can't stop. The engine will burn its own oil as happily as diesel fuel. With no restriction on supply the engine will with great determination over-rev and self destruct. You don't have to inject fuel into the cylinders through the injector pump if the engine is running. The inertial rotation of the engine and the compression inside of the cylinders will become self sustaining and as long as it can get air - be unstoppable. Usually it will lock up because it has used up its own oil if it doesn't reach harmonic destruction first (around 4700 rpm). When the engine locks up the harmonic balancer on the crank will not be able to stop because of inertia and will spin the end of the crank off or spin off its rubber center. If your lucky it will stay in the engine compartment. If the rod bearings aren't stout enough one or more rods will exit the block. The governor will not affect this scenario since the fuel supply isn't coming from the throttle. You must shut off the air.

 

[Skydiver]

A CO2 fire extinguisher will snuff um out.