Create something simple and have it ready to thoroughly block the air intake before attempting another start.

The oil coming from the vacuum pump could create the runaway just like crankcase blowby can.

In the first post the absence of a throttle body was mentioned, that isn't the issue IMO, as mentioned it is the amount of fuel controlling the RPM's.

Be extra careful, a runaway diesel is a dangerous situation that could send shrapnel flying.

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