1986 300E Fuel smell - Insists EHA valve was replaced!

What could be another cause? Unburned Fuel also seems to be dripping out of tail pipe after idling for some time. The passenger floorboard piece is
also missing and it seems a little hot on the metal. Does the exhaust pipe go by there on the underside?
Maybe the machanic lied about changing the EHA valve? Any other ideas.
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