RICESP Water Injected RX7

[Richard L]

If you run one injector per FJO P&H channel, the coil resistance of your fuel injector is on the border line of 4A.

3 ohm draws:
4A at 12V, 4.6A at 13.8V

4.5ohm draws:
2.67A at 12V, 3.06A at 13.8V

This could be the reason why the P&H is not triggering consistantly fo the 3 ohm injector, if the voltage is fluctuation between 12V to 13.8V. Depending on how you measured the current will give you false readings.

The only way to read current accurately is by breaking one of the wires to the fuel injector and put the two probes to each of the cut wire. Ensure the PICO is not grounded or connected elsewhere.