to be honest im not sure what you mean by the 4 port.. i just have my 2 hoses (from water pump and from engine) going into the firewall. dumb qeustion i thought of.. which side should the water pump be hooked up to the passenger side inlet or the driver side inlet? is it possible someone has these hoses on backwards?"

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1994 Ford Ranger 2.3 L 2WD