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Everything posted by GeneralDisorder
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The vacuum system may be incorrect - but the only thing that really matters is that the EGR is supplied with late ported vacuum and is opening correctly. The rest of the vacuum system really doesn't effect emissions enough to matter.
There is a passive air injection system that supplies oxygen for the old cat's to work effeciently - a new cat wouldn't need it but if you are conviced the old cat is still good then this system must function properly. It consists of two reed valves that are hooked to metal pipes that run to spacers between the heads and the exhaust manifold. Look for the spacers and trace it back to the reed valves - pull off the plastic silencers while the engine is running and insure that you can feel/hear the exhaust sucking in air. If they have been blocked by a previous owner to prevent backfireing you will hear no change.
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Similarly if the reed valves are broken you will feel raw (hot) exhaust - which will melt the plastic silencers and suck melted plastic into the carb....
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E85 is corrosive and your fuel lines, etc are not rated for it. I would not use it at all.
I would start with 25% denatured alcohol and go from there. You can run up to 50% but the more you use the worse it will run - no power, etc. Also retard your timing to increase combustion and exhaust temps - this will drive up the cat effeciency and will help to kill HC's too.
Rick
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Hey Brad - I would say that your catalytic converter is probably toast - usually they are broken up inside or just plain burned out. I would start out with a new cat from ebay - welded into the exhaust as close as you can get it to the cross-over where the two runners from the heads meet. If that doesn't quite clear it up then start mixing in Dentatured Alcohol from home depot, etc - that stuff burns rediculously clean and although you will have to retune the idle some and it will run like crap - it will pass.
Rick