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make sure to get that done quickly.
a valve that can't rest on the seat when closed won't have a chance to cool down there and burn.
Especially the one's on the exhaust side ...
well the vacuum gauge has a tick in it when that valve opens and second the care idles rough like you got a vacuum leak eventhough i don't cause everyone said that i had my wires wrong on my car but i woulda felt that through the whole rpm range where as this only occurs at low rpm