Embarking on a Ford EEC-V engine swap and integrating it with an OBD2 system in your classic ride? It’s a popular upgrade, and getting the wiring right is crucial. Let’s dive into some key points, especially focusing on the harness and sensor aspects to ensure a smooth conversion.
When you’re dealing with an EEC-V setup, remember the relay/diode pack. It’s usually connected near the main harness bulkhead with a substantial black connector. The engine harness itself branches out from the other side, handling oxygen sensors, injectors, and potentially transmission connections. Many enthusiasts choose to rework the harness to better fit their specific vehicle’s layout and sensor positions, often using protective sleeving for a clean and durable finish.
If you’re running a C6 transmission, the transmission harness section of the EEC-V harness might seem unnecessary. However, it’s wise to understand its components before discarding anything. There’s typically a 16-pin black connector for most transmission functions and a 16-pin grey connector with some overlap. Crucially, the grey connector usually contains vital non-transmission related circuits that you’ll need to retain for your swap to function correctly. Obtaining wiring schematics for the donor vehicle is highly recommended. This will allow you to pinpoint exactly which circuits are essential and which you can disregard for your specific application. Even if you’re sticking with a C6, understanding the full harness layout is beneficial, especially if you consider future upgrades, like a 4R70W transmission, which would utilize those connectors.
Sensor compatibility is another hurdle. The crank position sensors from a 4.6L EEC-V engine are generally not ideal for retrofitting into older setups. A better approach is to use a crank sensor from a Ford Contour, known for its compatibility, and fabricate mounting brackets along with a 36-1 trigger wheel for your crankshaft pulley. For the cam synchronization, a clever trick is to take the shaft from a 3.8L V6 cam sync sensor and integrate it into the housing from a ’96-01 Ford Explorer or Mercury Mountaineer cam sync sensor. Opt for the shorter tine version, not the half-moon type. The later models utilize a VR sensor for cam sync, whereas the half-moon type is designed for a Hall effect sensor, making the VR sensor more compatible with typical aftermarket ECUs and easier to integrate.
Successfully navigating a Ford Eec To Obd2 conversion hinges on meticulous planning and understanding the nuances of the wiring harness and sensor requirements. By paying close attention to these details, you’ll be well on your way to a successful and functional engine swap.
