Quote:
Originally Posted by Craig380
Yes, although I've never had a spark plug resistor fail as yet ... however I have had resistors in the plug caps fail.
On my old GT380 I used to use platinum plugs (later replaced with Iridiums) and non-resistor caps, and they never, ever needed re-gapping or cleaning. Used to give the tired old ignition system a helping hand  |
I have never had an integral spark plug resistor fail either (on NGK there is an 'R' in the plug number for resistor), the gap is the main thing, because as that gets bigger the coil has to produce more voltage to jump the gap and very often the higher voltage can make a coil insulation break over internally and fail. Iridium and platinum plugs need less voltage anyway because finer tip makes it easier to produce a spark and give everything in ignition circuit an easier life.