Hi guys
A strange thing happened to me today. I was going uphill with reasonably high revs when suddenly a "tttrrrrr" sound came from the engine. I realised the engine was running away (even with my foot off the accelerator pedal the engine was running at full throttle). I saw smoke in the rear view mirror. I managed to pull over and stop the vehicle. After turning the ignition off the engine kept running for at least 20 seconds.
The car now starts with difficulty, has an irregular idle, smokes profusely, is very weak, and the engine keeps running for quite some time after turning the ignition off.
What can this be?? Any ideas please?
Regards
Conrad
2006 Pajero GLX 3.2 DiD LWB A/T, aux battery system, roof rack, tow bar, 9000 Lumen LED Light Bar, Speedo Cruise (Bestech AutoCruise)
Definitely oil entering into the combustion area.
Did you top up the sump with oil? An overfill will allow oil to enter in the intake system via the breather and given enough heat, will ignite.
If not that, it could be the turbo seal has gone on the shaft, again allowing oil to mix with the intake air mixture and ripe for extra ignition.
Any one else got ideas?
If this forum comes up blank try the 4 x 4 Community Forum under Mitsubishi.
Good luck
Did you top up the sump with oil? An overfill will allow oil to enter in the intake system via the breather and given enough heat, will ignite.
If not that, it could be the turbo seal has gone on the shaft, again allowing oil to mix with the intake air mixture and ripe for extra ignition.
Any one else got ideas?
If this forum comes up blank try the 4 x 4 Community Forum under Mitsubishi.
Good luck
Sounds like the turbo. If not. Check the dipstick for diesel in the oil. My return valve on the fuel pump got stuck and the over filled the sump with diesel.
Sadly your engine is damaged by running at way over it's design speed once you pulled over and stopped the truck. Many engines disintegrate when running away.
This state is caused by additional fuel (oil) being fed into the engine, even when the ignition key is turned off. Such sources include sump oil due to ingress of diesel into the sump, diluting and increasing volume of the sump oil to the point it will pass the piston rings and power the engine irrespective of there being no diesel flow through the injector pump. This oil mix can also enter the air intake via the crankcase breather. As said earlier, serious passing of the turbo charger seal will allow engine oil to enter the air intake, again driving the engine on engine oil even when the ignition is off.
This state is caused by additional fuel (oil) being fed into the engine, even when the ignition key is turned off. Such sources include sump oil due to ingress of diesel into the sump, diluting and increasing volume of the sump oil to the point it will pass the piston rings and power the engine irrespective of there being no diesel flow through the injector pump. This oil mix can also enter the air intake via the crankcase breather. As said earlier, serious passing of the turbo charger seal will allow engine oil to enter the air intake, again driving the engine on engine oil even when the ignition is off.
Hi,
I had a similar situation sometime back and fortunately i managed to "kill" the Engine before it had gone "wild". I had done some reading on run away diesels before so when it came i was sort of subconsciously ready for it.
In my case it was caused by diesel leaking into the crank case via the return pipe from the injectors. what happened was after doing some work on the mortar, i did not adequately tighten the banjo bolt of the return pipe at the back of the head where it exits the head. diesel was leaking through there and into the crank case.
when the engine started to run away, i was fortunately at a slow speed and i realized the car was beginning to accelerate with my foot eased off the pedal. I immediately turned off the ignition and slammed on the brakes. It reved on for another 3 to 5 seconds and switched off. fortunately the revs did not go into the red. I guess that's what saved my engine.
I am afraid in your case your engine might be damaged.
I had a similar situation sometime back and fortunately i managed to "kill" the Engine before it had gone "wild". I had done some reading on run away diesels before so when it came i was sort of subconsciously ready for it.
In my case it was caused by diesel leaking into the crank case via the return pipe from the injectors. what happened was after doing some work on the mortar, i did not adequately tighten the banjo bolt of the return pipe at the back of the head where it exits the head. diesel was leaking through there and into the crank case.
when the engine started to run away, i was fortunately at a slow speed and i realized the car was beginning to accelerate with my foot eased off the pedal. I immediately turned off the ignition and slammed on the brakes. It reved on for another 3 to 5 seconds and switched off. fortunately the revs did not go into the red. I guess that's what saved my engine.
I am afraid in your case your engine might be damaged.
If it has moving parts, You can always figure out how it works. Not applicable for solid state hard drives. 
Am having the same, had the engine overhauled last year. Travelling through Zim going uphill had the same trrrrrrrrr, smoke and broke a rocker. Had the Head redone again in JHB. Drove 6000km and the same on an uphill, ttrrrrr broken rocker. Since then had the Turbo redone, injector pump, vacuumpump, new head and rockers. Can only be broken ring that pushes oil up on top of piston????
Take out the return pipe banjo on the fuel pump. The ball in the banjo gets stuck. Blow it with compressed air and check if it is moving. The ball on mine didn't move with a lot of air on it. I replaced it with a banjo bolt with a small orifice hole. All my woes stopped right there. I've also done the drill of overhauling it numerous times.
I had this problem with a Golf Diesel. Turned out the airbox was filling with oil from the crankcase breather due to blow-by. At high throttle openings (like pulling up a hill) it would suddenly suck oil into the combustion chamber & burn it as excess fuel. Only thing to do was cut the ignition so that fuel is stopped. Re-bore was required to fix the problem. Check your airbox/air filter for signs of oil carry-over.