I have a 91 hatch DX model and i have a leak on the passenger side. Whenever it rains or the road is wet i get water build up underneath the carpet. I checked underneath the chassis where the bottom meets the passenger side. I dont know where its coming and i want to fix it before the water causes the body to rust out..............Anyone with any ideas plaese help

 

Have you checked you firewall to see if all the rubber gromets are in place? Have you run wires from the engine bay to the ecu? could leak there if you have