Hello RX7 Community. I have recently purchased my first RX7 GSL-SE from an auto auction. It starts up every time no problem but has problem staying running. I hear a loud hissing from near intake manifold/check valve area. My tach isn’t working so i cant see where its idling at. Im also looking for a stock air box adapter of an alternate way of running filter from air pump hose? Any advise would be greatly appreciated.