Re: High idle with surge ??
A vacuum hose might have popped off somewhere (possibly under the plenum). After removal of the accordion air duct section, try blocking off the air horn with a very stiff binder book or very thick cardboard etc. If the engine doesn't stall or seriously complain, you can pretty much be assured of too much air getting in somewhere. You might even be able to hear the leak with the intake blocked.
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