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Old 06-23-2007, 12:05 PM
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there`s several ways. one, check the vacuum advance canister, make sure it`s not ruptured. since sprays are messy and it`s a new engine, use a mini hand held propane torch. Don`t light the torch of course, just turn it on, go around the base of the carb, the vacuum lines, etc. when the leak picks up the propane the idle should go up. Also check the modulator valve line going to the tranny, make sure it`s connected and there`s no breaks in the line. If you go over everything and find nothing, then yank the carb and look in the plenum, if there`s oil in the plenum, then it has a leak at the intake gaskets. If the leak is at the gaskets sometimes you can retorque them and fix the leak, but it most causes not. If they are indeed leaking, and if your intake is aluminum, then upon reinstallation don`t use standard fel pro gaskets, they won`t crush and they`ll leak, the standard fel pro`s are made for heavy cast iron intakes and not light aluminum. Fel pro makes a gasket for aluminum intakes although I don`t recall the part number. I usually just use the Mr. Gasket jobs, they`re made of paper and have a sealant ring around the ports.
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