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Runaway diesel isn’t the same thing. That’s often due to unwanted fuel or oil getting into the cylinders which causes the engine to run away. It’ll often only stop once it’s consumed all the oil in the sump.
My mum's fiat 500 did this, was not fun apparently.
snottyotter-
I had a company Isuzu pick up do it to me after I booted it out of a junction turning right on the A4. It just went into infinite acceleration with a massive white cloud out of the back. I sort of knew what was happening but I could stop where I was so went a couple of hundred metres further before switching the ignition off and standing on the brakes. I got out quickly because it smellt like it was going up. It had done a touch of the *Torrey Canyon all along the road and it appeared that the increased crankcase pressure had blown all the seals bathing the engine in oil too. I called the filth to get them to call out the council for a clean up of the road and with assistance got the truck off the road. That was the day before Boris told everyone to leave work and go home. As far as I know it still isn't fixed.
- That's one for older readers. I was going to suggest Exxon Valdez for the young'uns but that was 1989!
- That's one for older readers. I was going to suggest Exxon Valdez for the young'uns but that was 1989!
Constable_Savage
Runaway diesel isn’t the same thing. That’s often due to unwanted fuel or oil getting into the cylinders which causes the engine to run away. It’ll often only stop once it’s consumed all the oil in the sump.
The black smoke is a fundamental issue with diesel combustion. Low cylinder pressures and low (relatively) injector pressure causes that black smoke. Because the combustion is so incomplete, a lot of air gets out unused, so those diesel tuners simply pump more fuel in until all the air gets used and that gives them their maximum power. The result is all that black smoke.
Auto manufacturers started getting round this in the early 00s by significantly increasing the cylinder and injection pressures and injection timing. That increased the fuel efficiency somewhat and stopped most of the black smoke, but forced the particulate size smaller. PM10 became PM5, and now PM2.5 and smaller, which is basically nanoscale particulate and quite carcinogenic because it readily passes through cell walls.