this post was submitted on 13 Oct 2025
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Mechanic Advice

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90's EGR Systems (lemmy.world)
submitted 4 months ago by Fuckfuckmyfuckingass@lemmy.world 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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[โ€“] empireOfLove2@lemmy.dbzer0.com 4 points 4 months ago (1 children)

Jdmfsm.info and charm.li may have some factory manuals you can use for diagnosis. If it's true JDM though there may not be manuals you can read.

[โ€“] Fuckfuckmyfuckingass@lemmy.world 2 points 4 months ago

Thanks for the links. I'm pretty used to Google translating these things at this point. It's funny every time I find a manual for this Japanese rig it's in Russian.