Mike8675309
Registered User
is it because it is platnum not copper? or is it the 103 plug? If i were to replace them what should i go with?
Platinum doesn't conduct electricity as well as copper. Thus you can achieve higher energy with straight copper electrodes vs platinum coated electrodes.
That all being the same, if they are gapped to .035 they shouldn't have an issue up to 15psi as lots of folks have run double platinum plugs and 15psi in the past without issue.
The best plug is a standard copper plug that you simply change regularly.