This car has no title, and we are going to use it as a rally car in a local race. That being said, we have run it pretty hard and have lost cylinder 3. Car is a 1983 Thunderbird Turbocoupe with 5-speed. A friend and I pulled it out of a field and tried to get it running again. We ran into stuck injectors, the camshaft being mistimed and many engine harness wires that were chewed through. After all fixing these three issues, we got it to start and run decent enough to drive around a field. The car would run very poorly until it hit boost, then it would clear up and take off. We assumed that this running was the result of our poor timing without a timing light and the computer being in open loop because the O2 sensor wire is chewed through (I am not familiar with this EFI system, so I'm just applying knowledge that I've learned in classes from late model vehicles).

Earlier this week, we had it out in another field and we lost cylinder 3. Cylinder 3 has now become a dead miss at idle, with removal of the plug wire of cylinder 3 not affecting the engine running (with every other plug wire doing so). Since then, we've properly set the timing to 9* with the spout connector disconnected, new plugs (hotter range to 'clear' oil fouling if that was an issue), plug wires, looked at the cylinders through a bore scope (they have clearly suffered detonation), compression test (all cylinder 150, cyl 3 was slow to reach 150, but did), leakage test (cylinder 3 15% leakage), looked at cam lobes and pulled the fuel rail and watched fuel spray from all 4 injectors. We also checked and the cam is still in time. We think we have everything we need to run, and can't figure out why it won't. An instructor used manifold vacuum and a picoscope to verify the valves were opening by looking at pressure changes in the intake and exhaust, and the valves are being actuated properly, as far as we can tell. Our only thought now is to switch fuel injectors between cylinders and see if the miss follows the cyl 3 injector.

Any suggestions on what direction to head now?