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I'm not sure if this is causing the CEL lights and the rough idle and stalling at Idle, but I have found a design flaw in the Clutch boot seal. The bell housing of these cars has a vacuum port to equalize pressure across the rear main oil seal. Last week when I pushed the clutch in, my car stalled. I immediately suspected this was the problem because I had a similar issue on an old 280Z. The design of the boot is such that they really have a flapper or reed valve. I cannot see how this could ever seal from day one from the factory. my engine was running rough and when I sealed the hole (about .5"/sq) the engine idled perfectly. I think this may be one of the root causes for the CEL lights. I am looking for a better aftermarket design, but cant find one. I ordered a factory boot and will use some RTV to bond the flap to the fork. Very bad design. I would have created a "U" shaped channel out of the boot and slipped it over the fork. Pressure would have sealed it in operation
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