Found some good links to previous posts about the butterfly valve inside of the throttle.

These are almost identical vehicles, with people asking the same question.

Butterfly, one more time

butterfly and EGR associated vac lines on W123's

Here's where people are discussing the chance of it "running away". Which I do not want. haha! Although I do not think the butterfly valve could stop a runaway, so removing it wouldn't make a difference apparently.

Anyone ever have a runaway diesel?

And the final runaway thread

Run away diesel, why does it happen?

Damn that runaway thread can really scare the crap out of a person. I'm going to buy a co2 extinguisher and go over the steps with my wife. Although I sort of feel like telling her to just run away from the car if this happens.

lol, yeah, JB weld.

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83 SD

84 CD

Just a follow up here. Mostly for future searching.

I removed the plate in the butterfly valve and drove it for the day. No runaways yet! I really do not think the butterfly valve would have any ability to stop a runaway engine. Even if it created a better seal, which is unlikely, it would still eventually pull open the egr.

I'm now removing all of the linkage and this diagram came in handy. I've X'd out the parts I've removed so far. I'm still hesitant to remove the transmission 3/2 valve and the associated linkage because that all works so well at this point. In the future, if it begins causing me problems, I'll probably just remove it all. So far so good.

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