Hi Guys & Dolls!

i got an electronic problem and donīt know if it could be solved by a single PIC or if I have to use two.
Heres the Problem concerning an automobile ignition circuit:
I got pulses with a frequency ratio of about 20 to 1 : from ca. 150 ms (engine cranking) to 2 ms. The coil needs 1 ms for charging.
first process: measuring pulse lenght (pulsin could do that)
second: starting charging the coil after "pulse lenght - 1 ms" that leaves the one ms and the follows the ignition .
this has to be done real fast! and the pulse lenght changes often.

do I need two pics?or three? is PBP fast enough?
tried this with a 12F629 without success because i need one loop for pulsin and a second one for the output.

can anyone help? Hi mister_e! (did me a favor two weeks ago)