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lol My experience with Seafoam (the AI spray method) was that it did nothing. Guess I got lucky.

+1 ^^ Looks more like neglect. Clean out the hose too. Or replace it. Then monitor. That could be 10 years of crud you see there. (typical minutia iow) Pop off the throttle body and clean around the butterfly as well. Metal gasket. Be gentle, should be ok. If missing, install one. The...