Here is a bit more detail but perhaps not enough. I would have liked to have had a closer look at the flow splitter device that directs fluid to the passenger and driver side nozzles. I also found it very difficult to get a look at the washer fluid reservoir. It must be somewhere way down near the front on the passenger side, underneath that headlight.
Back at the cowling, the water supply line comes from the passenger side, passes through a flow splitter device and extends to the driver side and passenger side nozzles. I removed and switched the nozzles with no improvement in performance. The nozzles appeared to be identical.
Below is a photo of the nozzle as seen from the business end. Note that there are tangs on the left and right sides that need to be released to bring the nozzle up out of the cowling. I use a long, fine flat-bladed screwdriver to release the nozzles, approaching them from the left and right sides. It probably helped that the car was in full sun on a warm day. The hose and the plastic parts were all maximally soft and less brittle.
To check the nozzles, I attached a length of Tygon tubing, filled it with water, and blew. The flow seemed to be, if anything, too unrestricted.
I'm a retired chemist, not a physicist nor a hydraulic engineer. I have a vague recollection from elementary physics class over 50 years ago that a fluid in a hose experiences a pressure drop that is hose length dependent. Engineers, does it seem reasonable that the added 2-3 ft of hose to reach the driver side nozzle is really all that significant?
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