Just bought a 93 sc400 and cannot get the thing started. Cranks but will not fire up. Replaced ECU, caps, rotors, and plugs. Basically the end result is the LH cap is not producing any spark. I have spark out of the coil wire into the cap but nothing coming out of the cap itself. I am a mechanic but new to the Lexus/Toyota V8. I'd like to see if I could nail this down before I throw any more parts at it. My guess is a cam or crank sensor, but any feedback I could get would be greatly appreciated.