Okay just ran an experiment. Disconnected nozzles 1 at a time and blew/sucked through flex straw held at attachment point (very scientific). Passenger side the air moved pretty freely but driver side did not. Must mean check valve is inside of nozzle assembly and passenger side has failed. Makes sense as that was the more noticeable leak but it's also upstream of the other one. I will replace nozzle (and 2 clips I snapped in the process) and update.

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Scott

2005 4.8iS TS/BLK