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Originally Posted by Pete Deksnis
I'm curious. Does your Toyota shut off with a mechanical linkage like the old Nissan 6-33 IH used in a '77 Scout I once had? (sadly totaled in '87 in a head-on with a Toyota truck driven by a soused up kid.)
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It's an electric solenoid valve on these. I also have a Nissan Maxima with the SD-33, and it has a very similar fuel system to the Toyota. I've heard that once in awhile, the solenoid will jam and require a swack with a hammer to stop the engine! (Hasn't happened to me yet, but several other members of the Toyota Diesel club have had that). The later Toyotas have a "slam door" that cuts off the air when the engine is shut down. That serves 2 purposes; (1) that brakes the engine quicker so that the truck doesn't rock violently on shutdown, and (2) in case of a cracked ring or other cause of engine oil coming up and fuelling the engine out of control, it will stop it.
Was your Scout like the Mercedes with the lever you could shove down to stop the fuel (totally mechanical)? My Maxima is an '82 and has the electric fuel cut, so yours might have been an earlier different pump.
Charles