Quote Originally Posted by Acetronics2 View Post
Top secret electronic ignition ??? ....
MC3334P clone ?

- ADC inputs have a maximum input feed impedance to respond as fast as required ... see Pic datasheet for details.

so, I presume @ first sight your current detection is wayyyy too slow, and your coil enters saturation ...

add to that your IPB protection is wayyy too weak and slow !!! be prepared for in-use failures, after some running time.

Now, automotive circuits need lots of filtering to avoid pic supply surges ...

Alain

No current detection - just if IG is on (12V) and monitors battery voltage - this all working for past 5 years. Discovered the issue of no load it starts right up - with load it resets program. In other words I can turn it on with Ignition and then apply load - works. But I can tell the program gets reset because I put a turn on/off red led before the main and it comes on when IG is applied. I'll try caps later tonight on signals.

I also do not think code is correct setting up registers. Thats what I want help on.