Your HT voltage is not higher because of the different map, that's not how it works.
You do have a problem though, most likely a bad HT lead to plug cap connection. May be just a matter screwing the cap on the HT lead another twist.
Tell your dealer, this should not happen.
You do have a problem though, most likely a bad HT lead to plug cap connection. May be just a matter screwing the cap on the HT lead another twist.
Tell your dealer, this should not happen.