ORIGINAL: Jezmo
ORIGINAL: w8ye
When shielding, normally just one end is grounded so that RFI does not travel along it's surface from point ''A'' to point ''B''
Yep, normally that works, but sometimes a worm drive clamp is necessary on the plug end along with a bonding (grounding) strap back to the module in order to eliminate the RFI. Been down that path already and it was the ONLY solution that worked. We tried the clamp on the plug boot cap first but the interference finally stopped after the bonding strap was installed from the engine case back to the CDI box. Almost always just bonding one end, like you said, will get-r-done. Take care Jim.
Had a problem recently with an engine using an RC exl ignition where the throttle servo at low to mid range would every now and then oscillate very rapidly for a second or so causing the engine speed to change. Changed the servo but to no avail, I then tried the hose clamp on the spark plug cap suggestion and that did the trick.
Karol