reducing the RFI from the Jackaroo Engine Bay 
(aka Isuzu Trooper,Isuzu Bighorn,Vauxhall Trooper,Subaru Bighorn,Acura SLX,Chevrolet Trooper,Opel Monterey,Honda Horizon)
 The idea is to reduce any RF noise radiating from the Fuel injectors, Spark plugs and various sensors
 that may affect predominantly HF radios and 50 MHz, to a lesser extent on 2metres and pretty non-existant
 on 70cm and higher bands. The noise on HF was pretty low, but it became even less after adding the ferrites,
 to be point it very hard to detect ignition and injector noise and that is from a HF whip mounted on front bullbar.
 You will want to get various sizes of ferrite cores, obviously, sizes that fit nicely  onto the cable
 without pinching wires, or forcibly bending cables, to avoid stressing cables, plus the ferrite cores
 cannot be loose fitting as they will then slide and shake about on the cable causing fatigue to the cable.
 If the ferrites you have are too big and quite loose fitting, then wrap a bit of black tape on the harness you
 are clamping too, but ideally the smaller the inside diameter the better the ferrite will work.
 NOTE : you can apply the same techniques to other vehicles.

1. this is the right hand side on V6 engine, showing ferrites added to fuel injector and spark transformers
and to the DC ground point, where I added two ferrites and also a ferrite on the harness that provides the switching
for the injectors and spark blocks.



2. add ferrites to the DC ground terminal blocks, this picture is on left hand side of engine bay, there is also
a similiar block on the right hand side of the engine bay, where I also added ferrites.



3. this is on left hand side of engine bay, added ferrites cores to harness, this is main feed from the engine modules inside,
where the harness passes through the firewall and distributed within engine bat. I added a ferrite core to the Cruise Control unit
harness to reduce risk of my transmitters interferring with the Cruise Control



4. this is left hand side of V6 engine, added ferrite cores to Fuel injectors, spark transformer blocks and to the DC ground
connector on the engine.



5. this is at front of the V6 engine, this harness connects to various sensors, these sensors can make clicks that radiate RFI
as each sensor turns on and off.