diesel run away tonight while going down the road
- Thread starter warhog
- Start date
got the call today, said the glow plugs are shot (yes they were brand new motorcrafts when the engine was installed). said the tech told her they look like they been through ether. That leaves me with a) someone at the shop tried starting it with ether or b) what else would cause them to be that bad?
GP controller is brand new but i am aware they fail. Aside from that, anything else? Too much fuel? idk..
GP controller is brand new but i am aware they fail. Aside from that, anything else? Too much fuel? idk..
icanfixall
Official GMM hand model
Too much advance will ruin a glow plug. We aren'r able to actually see what the plugs look like so its easy to guess what killed them. I'm thinking your getting that same horrible shop to work on yout truck. They are not worth the bullets thats for sure. Going to another shop is long past due but... Someone is going to have to pay to get this engine running correctly. I recal it was a complete engine ready to drop in and it ran away with you. That right there was an omen looking back. Sorry your still having issues with what should have been a plug n play enfine form a good company ready to run...
The problem is, if i take it to another shop, i pay unless it's a jasper issue. If i take it to another shop just for a diagnoses, the installation shop will never touch it again. That's the problem with warranties.
After reading all this, have you had timing checked? Also since it is a pre 87, have you bypassed or replaced the factory water seperator? They are prone to leak air also. Bypass it for a day or two, see how it starts... Then replace it anyway even if it is good. Napa sells a nice seperator that almost bolts in the factory location.
This is the thread I was looking for. I have a 1985 F250 4x4 Diesel four speed. I changed the oil when I got it last summer about 1800 miles ago. A couple weeks ago I noticed the engine temp light slowly coming on, the gauge read fine and there were no signs under the hood that it was getting hot. One day while driving to town, the engine suddenly started to get louder, kind of a diesel knock kind of a sound, and then the RPMs took off to the moon. I stabbed the throttle a couple times and it returned to normal sound and RPMs but it didn't seem that pumping the throttle is what fixed it. I got home and parked it for several days and kind of forgot about it. One day I needed it for some chores and to check cattle. I'd had it running for about an hour and as I was driving back to the shop, it ran away twice more. Neither time was bad but it's obvious something is wrong. When I got to the yard, I popped the hood and pulled the dipstick, it was way overfull, all the way over the twists in the dipstick. I know that when I did the oil change it was left about a half a quart over full because I stopped short on oil and put a little Lucas in it. After reading everything here it looks like I'm leaking fuel into the crankcase and it got full enough to push it up past the rings and start a runaway. Does this sound accurate? Is it likely that I have a problem injection pump that is filling up my crankcase? What kind of money are we talking for an injection pump? This pickup does have CC that doesn't seem to work but I haven't been under the hood to disconnect that from causing future problems, it's about eight degrees out and the wind is blowing 30, I think I'll wait for better weather. I have an '86, same configuration, that's plugged in and ready to go for chores in the morning. I like these older diesels, but I do keep spare pickups around for occasions like this.
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79jasper
Chickenhawk
LIFT PUMP!!!!!! 99.9% guarantee!
icanfixall
Official GMM hand model
My educated guess is the manual lift pump too. Its located under the alternater and vacuum pump. Both of those needs to come off the engine to reach the lift pump. Its got two 9/16 hex head bolts. One rubber hose and one tubinging nut. Careful when you install the replacement pump. Its got to be installed under the cam excentric log or "things" will happen. That rear most bolt is the hard one to get in place. Try tape around the hex and the socket and the extension. Trial and error works..
88IDImattman
Full Access Member
completely amazing detailed description felt like i was there seeing it happen ...glad you got her back under control an that nobody got hurt ...here is to hoping they can diagnose an fix it all with quickly an get you back on the road
salvagesavage
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I KNOW THE FEELING !! hotrod 500hp throttle hung ------- steel telephone pole- fire hydrant - 2006 caravan dealers lot and just about got a newer honda too and a brandnew enclosed trailer ........... lets just say expensive !!!!!!!!!!!! broke one knee cap ,,,,, smashed my head into steel above winshield,dented my skull in quarter inch............... have not been right since really ,headaches ect ......... brought my hotrod home and rebuilt it completely because i could not handle people looking at it and the comments........ worked for a whole year in my shop ,,,,,, the only thing it didnt damage was the cab !! spent $40000 but
didnt have to listen to any omg look at your hotrod ect ................ worth every penny !!! QUOTE - always respect Mechanical Power ...................................
didnt have to listen to any omg look at your hotrod ect ................ worth every penny !!! QUOTE - always respect Mechanical Power ...................................
salvagesavage
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if i was maybe a foot to the left !! this note would not have been written lol
Alrighty boys, picked the truck up just now, they left me the old glow plugs so i could look at them. i'm uploading a picture now, to say they are destroyed is to put it lightly. We have to figure out why this happened, jasper will be getting a call monday to be aware of this.
Black dawg
Registered User
advanced timing.
I wonder if that happened during the runaway.
I have seen pissy injectors do that to.
I wonder if that happened during the runaway.
I have seen pissy injectors do that to.
79jasper
Chickenhawk
Honestly, after seeing that, I think you should do a compression test by yourself. That engine may be screwed. Definitely had to be caused by either.
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