Bought a sweet '93 Ford ambulance with 88,000 miles. Drove it 200 miles home & about 50 local & bought fuel, then the fuel filter light came on so I bought a Wix 33617 which I guess is wrong. It's a Ford E-350 cutaway with a Horton body. It screws on like normal but has a bottom cap where I assume is the drain. Anyone know which filter I need? It was changed 3-15-15 written on the filter & written under the hood it says fuel heater changed 3-15-15. It doesn't have a fuel heater does it? That wasabout 8,000 miles ago. Any & all help will be appreciated, Thanks! Eric