Ignition Problem

[Walter Petermann]

Simon Quested wrote:
> 
....
>So I connected works fluke scopemeter up to the -ve of the coil and 
>this is what I saw.....
http://www.lincoln.ac.nz/ccb/techs/simon/netpics/coilpuls.jpg

I don't think there's anything wrong with the fuel ecm. The
shorts
to ground on some of the 'shorties' is probably just making
the ecm
count 'extra' ignition pulses and mess up the injector
timing (on the ecms I work on the injector timing is derived
from the ground pulses
on the coil - ).

Adding to the other suggestions, have you tried isolating
the coil
case from ground? It's curious that the shorts to ground are
right after
a tall trace.

Now you have .06 worth!

Walt