[RFI] Toyota Tundra RF Noise

[Ford Peterson]

I have a pickup with a IC706MKIIG installed.  The HF antenna is in the driver's side middle stake pocket on the box.  Moving the antenna does not help.  The noise is clearly audible on another radio in another vehicle.

It's a 2001 Toyota Tundra V8 (4.7 liter)--same engine as a Lexus.  While there is noise from two sources, the fuel pump I think I can figure out.  What's giving me fits are these new 100,000 mile no-maintenance engines.  There is no distributor.  There are no plug wires.  No coil.  Only these spark plug pods.  Each of the 8 pods contains its own coil, condensor, and firing mechanism.  There are 4 light gauge, low voltage, wires going from each of these pods back to the computer.  None of the on-line or printed RFI resources I can locate discuss this type of design.

The only 'serviceable' parts in the thing are the spark plugs.  So I pulled the pods off the engine block and replaced all 8 plugs.  No change in noise.  All the traditional mitigation techniques have been tried regarding grounding all the possible ground loops, of which I found none.  The noise is clearly centered on these pods.  

I should say all techniques but one that is...

It appears that I'm going to have to completely seal that harness with a shield of some sort.  The trouble is, the harness is HUGE.  It's the size of my wrist and has wires going in and out all over.  Does anybody know of a good way to mitigate this type of noise, which is S9 on all bands <15M?  Is the shielding of the harness the way to go?  What material does one use for this mitigation technique?

On or off list would be fine.

Thanks

Ford-N0FP
ford at cmgate.com