[Scar0]

Pull the cowl below the windshield on the RF.

In there is the a screen(air intake for heater)

If the side drain areas by the fender are full of crud the water will back up into the air intake and drip into the motor.

 

[Scar0]

Your welcome. To completely remove the cowl you will have to remove the wiper arms, and may have to take off the hood.
I had a similar problem with my daughters Cherokee. There were tons of pine needles and other crud in the side by the fender.
After a good storm she would have 1/2" of water on the front floors.