Ref. Signal off of AMC I6

[Mike Comai]

I am currently trying to get my first major retrofit up and running.  I
have everything installed and when I try to start it the injector's don't
fire.  I was told that I need a filter on the negative side of the coil
and to feed the filtered signal into the Reference line on the ECM (which
I am using a '747).  I was given a design for a filter which looks like
this:
               5K               10K
Coil    -----/\/\/\/---------/\/\/\/\------------ ECM
                        |               |
                      -----           -----
                      ----- 15uf      -----100pf
                        |               |
                       gnd             gnd

When the filter is in place, the injector don't fire.  When I remove the
filter and connect the coil directly to the ecm it appears to flood out
the engine :( If someone could explain what voltages levels and shapes are
present on the neg. side of the coil and what it needs to get conditioned
to for the ECM that would be great too.  Appreciate any help yall could
give.

Mike Comai
'79 CJ5