That is the method I referred to earlier in this thread. I have not done
this myself, I have merely spoken with someone who had it installed. The
14 pin connector of the instrument cluster has a green wire and a brown
wire running to it. Run a wire from each of these to a small switch.
When the switch is closed, the ignition coil will not get pulsed and
there will be no spark. The fuel pump will run and so on but no spark.
I don't know what problems if any may result. All 2.1 models have the
green wire. For 1.9 only a few 84 and most 85 have it, only the 1.9
models with tachs.

Mark

Daniel Stevens wrote:
> Would grounding the Tach signal wire  COIL - side mess up the IGN
> system? or even interupt it?
> just thinking out loud..
>
> Dan
>
>