Ignition on FI

[RICK LAKE]

diethelm It sounds like a basic system you are running like the old Accell FI system when it came out. 4 injectors in the top of the throttle body that look like a carb. It had 4-6 adjuster for the system, cold start, low rpm, medium rpm, high rpm and ilde. It was an open loop system. They added a O2 sensor the next year and the system got alot better. It was a batch fire system and worked good as long as no water got on or near the ECU. It only had limited controls. If you go back about 40 years there where mechanicial fuel injection system like the Vette's. As far as the timing between a single coil and multi ones, it's all in the soft ware. You will make a hotter spark with the 4 pack over a single. As for duration of the spark, msd has a 15-20 degree long spark. The coil packs are less but hotter for a shorter time. For shutting down a motor, a low oil pressure sensor would kill the motor is less than 20 psi was in the system. You need a bypass to start the car. Knock sensors can be added to retard timing under load. Coolant sensor can work like the oil pressure and turn off the fuel pump if a certain temp it reached. You can hook up to either a fuel system or ignition system to save the motor. Fuel is better with an FI system. You are basicly looking at the has thing as what a MSD box does with timing control and a rev limiter chip. Rick