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The opamp circuit in post 103 works with the gm tbi peak and hold injectors with the addition of a capacitor on the avr input pin and to ground. This keeps it from missing pulses and it seemed more or less right on mine. I can't test it any further though since it is no longer gas.
I can't remember what size cap it was but it was a small electrolytic. It was just enough to smooth out the small gap on the very short pulse width signals that the mpguino would miss the interrupt on.
I still have some of the current sensing chips I ordered and never uesd. I could send them to you if you want them dcb. Just let me know and I will send them to you to play with.
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