[Mobile-Portable] 97 Chevy Tahoe noise problem

[Dick Flanagan]

Hi, Rick.

I'm pretty sure Scott isn't proposing to shield his spark plug wires by 
sliding braid over them.  In modern ignition systems wire sets are part of 
a complex inductive system under the control of the ignition 
microprocessing system.  External braid adds a bunch of capacitance to the 
equation that a lot of systems can't handle.

Scott was only talking about using braid as a bonding medium between metal 
components of his car.  A long time ago I would have (and did) try to 
shield my plug wires, but not with today's tuned and balanced ignition 
system.  I leave the entire issue of wires strictly up to Magnacor.

73, Dick

At 03:18 AM 8/2/2004, Rick Markey, KN3C wrote:
 >Scott,
 >
 >One caveat about the 213 braid application.  I tried that trick on my 94
 >S10 Blazer.  A similar technique was written up in a QEX article.
 >
 >Even though I was running brand new GM factory ignition wires, I
 >immediately started to get arcing through the wires and onto the braid.  As
 >a result I abandoned the project because of misfires and poor engine
 >performance.  I asked a mechanic/ham friend about this and he suggested
 >putting something between the ignition wires and the braid, such as plastic
 >spiral wrap, to provide a bit more insulation.  I did not go back and try
 >the technique again using the spiral wrap.
 >
 >So just be prepared for some potential problems when you apply the braid.
 > These new high energy ignition systems really pack a wallop!
 >
 >de Rick, KN3C
 >
 >
 >
 >----
 >Your Moderator: Dick Flanagan K7VC, mobile-portable-owner at mailman.qth.net
--
Dick Flanagan K7VC NV SM
E-mail: k7vc at arrl.org