1995 F250 powerstroke 5spd
I was shifting from 3rd to 4th at about 1900 RPMs and all of a sudden it opened up all the way at full throtle and was smoking black from the pipe and under the hood from 1-2 min. It left about 1 quart of oil on the ground. Couldn't get it to stop running. The truck has 116000 miles and is in great condition and was running fine and had no leaks. Was getting 18 MPG highway and 13.5 city. Any replies would be great. Someone said that diesel builds up in the crankcase and when it gets so much pressure it blows a release valve somewhere on the engine. Is that what happened or was it something else?

 

Check your oil level. If it is high your engine was running on crank case oil. On the other hand, if it ran that way for 2 minutes, it may have used up the excess oil in the crank case. Has the engine been started since this episode? Will it run? When it cranks does it sound like one cylinder is low on compression? Have you checked under the truck -- is there a hole in the block or oil pan? If not, drian the oil and examine the stuff sticking to the magnet in the oil drain plug. If it has a bunch of metal shavings stuck to it you probably scored a cylinder bore. That is about the best I can do until I get more information.

 

Sounds like a turbo bearing might have gone bad which will dump engine oil into the intake charge a cause a diesel to runaway.

 

Update need help, Runaway Diesel. 1995 7.3L Turbo

 

I have no idea....but I am going to go pop some popcorn cause I have a feeling this is going to get interesting..............anybody got some butter!

 

Butter Please! Yep, Its blowing white smoke that could be seen the the moon.

 

is it smoking white or is it running away? big difference, if it "runs away" you should do the same cause unless you have a block of wood to hold over the turbo inlet really quick then parts will scatter.

we need more info about your truck and what exaclty your concern is.

 

white smoke is raw fuel, is this cold start or all the time? if its all the time then you have a stuck injector or low compression in a cylinder

 

Is it just me or is the original post from February 2003?

 

yup, its an oldie, how did he dig it up? lol the searches never work for me!!

 

I had the feeling we had some use the search feature so I wanted to sit back on this topic......Joe you just know everything,no need to use search.

 

Here's the deal. The engine does do the "Run Away". Things that have been found. Fuel in the oil, Lots. This started while the driver was getting on the Hwy 55 mph, no load.
95, f350 turbo. Can a bad injector does this? Injector seals?

Please help, An Thanks

Bobby

 

ron, i wish i knew everything...HA!!!!!

if the motor runs away how do you stop it? you would have to cut off the air supply in order to stop the engine from running, when she goes, it revvs till it explodes, there is no stopping at the rev limiter.

fuel in the oil is very bad, its most likely injector or seals. if you have tons of fuel in the oil i would assume you have a miss as well? low power?