I had a 79 Peugeot 504D with a 4 spd manual transmission many years ago where I expereinced a runnaway while driving. I was in second gear and all of a sudden it went full throttle and the car took off. I shut the key off but it kept accelerating. Scared the ***** out of me. I left it in gear and applied the brakes to slow down and stopped and was able to stall the engine. Car was towed to the dealer and I was told the IP main shaft seal leaked diesel into the crankcase till it got high enough and fuel was sucked through the rings and caused the run away. Had the seal replaced and all was well- no harm done to the engine. If it was an automatic the engine woulda been toast.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked