1989 Toyota Supra



September, 22, 2010 AT 3:02 PM

Engine Performance problem
1989 Toyota Supra 6 cyl Two Wheel Drive Automatic 299k miles

I was wondering if it's possible to remove the EGR valve from my 7M-GTE without pulling the intake manifold and/or cylinder head. I looked at it, and it seems like I can, but I'm limited on tools. I've already pulled the intake manifold twice in the past 3 months, and I really don't want to do it again. Even better would be a way to clean the valve without removing it and without damaging my 02 sensor/cat.

2 Answers



September, 28, 2010 AT 9:26 AM


I don't think you can unless you have small hands. If you can take a few pics of the area and I can give a better answer. Looking at the diagrams I have it looks like you may be able to just remove the Plenum, but diagrams not to good for determining you question.

If you want to try something first, here is what you can do.

Goto your local parts store and ask for Sea Foam it is a fuel injection cleaner plus does lots more.

Here is what you do first find a vacuum source near the EGR Valve, Oh you will need a longer piece of vacuum hose, hook it in place of the original hose. Then start the vehicle, you will need to be able to hold the excellerator at a higher level so doesn't stall. Disconnect the hose furthist from EGR and stick end into the Sea Foam. Only put it in for a couple seconds at a time and remember to keep idle high enough so won't stall. Do this till about half the can is gone.

If happens to stall of course restart.




October, 2, 2010 AT 5:13 PM

Thanks, I'll try the Seafoam thing today. Removing the intake manifold is much easier than pulling the head, so that's a weight off my shoulders. I'm going to test the entire EGR system today as well. Let's hope the problem is just a bad vacuum modulator or EGR canister so I don't have to pull anything out! Thanks again for calming my fears of a full weekend!

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