🚀 go-pugleaf

Hi all...
    this next inquiry is as off the wall as you can get....
I have been dealing with INFO-UNLIMITED for the past few years and
have obtained one of their VED-1(Vehicle Electrification Device)
in theory the circuit is similar to the Standard CD ignition devices...
btw it generates Pulsed DC in the 20-25 KV range with about 200 Millijoules
output from 10 to 20 pps... the device is wired as a negative ground...the
positive output of the device is then run through a length of ignition cable
to a chain dragging on the ground(insulated from the vehicle of course)
when the cars body is touched a shock to the recipient results...(
PLEASE dont worry about the liabilities or legalities at this point...
my inquiry is technical only at this point)   my question is this
Assuming that standard onboard ECM modules are on the vehicle
along with a 1500w inverter and LOTS of computer and communication equipment)
are installed on the same negative ground... will the onboard equipment be at
risk from either direct or induced voltages...btw its wired so that if
the main battery is disconnected without permission or the wire to the
alarm system is cut then the device is switched on with a backup battery as 
its power source...are my ONBOARD computer systems and comm gear at risk...
is there a way to shield this equipment if it is???via lightning arrestor
circuits or some other method...PLEASE someone help this harebrained
computer freak out before I have to rebuild all the onboard equipment...

       thanx all
       kelly
p.s. since this might have some application to a number of readers please
use Followups as opposed to email so all can benefit...
if you want to flame me... my email is kelly@uts.amdahl.com
I am also crossposting this to rec.autos.tech