Start problems in wet conditions

HI Leutz, My Omme has a problem when it’s wet outside and the car was standing for a few hours, it’s like running only 5 zyl at first twitching.Really only the first second Today where it was dry he started with all 6. I have to say that I have a crack in the ignition cable that I patched with isoband for the first time.Maybe that’s it? because after a short start it always works perfectly. I just might have shot the ZKD hi Over, but: Cooling water normal, no loss or excessive pressure or air in the system oil I.O MFG Markus