Hmmmmmm maybe you might try that with a pressure gauge of sorts inline on the air line to the ALDA. That way you can really see what's going on. If everything is working properly and you block the waste gate you should see a dramatic difference. I wonder if there is something else wrong, maybe the waste gate is stuck open or maybe the wrench left a small gap and enough air got through to open it? I'm not sure but here in SoCal there are lots of hills and this extra boost is much appreciated.

Frank.

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'82 300SD