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90's EGR Systems (lemmy.world)
submitted 1 year ago by to c/mechanicadvice@lemmy.world
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Anybody know anything about 90's vacuum controlled EGR systems? I've got one of those goofy little Japanese import trucks, and finding info about how it's supposed to work is a nightmare.

There's a pretty good vacuum leak out of the top of the vacuum amplifier/signal doodad. Kinda UFO shaped deal between the vacuum advance, intake manifold and the canister.

Any ideas on diagnosis, or ways I can figure out what's doing what would be helpful.

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[–] 2 points 1 year ago (1 child)

Car Wizard uses a smoke machine to find vacuum leaks. As in, injecting smoke into the system so you can see where it comes out. I thought that was pretty clever.

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