I bought some Platinum Spark Plugs for the car for two reasons.
1. I need some to run higher boost
2. Mine never seem to sit right so blow of HT leads
They last for 40-60,000 miles so I could put them in and not worry about them for ages which suited me fine.
So, after much faffing about between different garages I got my 4 plugs and put them in today. Boosted up to 1.2 bar and it sat there fine, felt great. Reached 5,500rpm and
The sound of an HT lead hitting the underside of the bonnet. Oh god not this again was my thought. So, I've spent hours and hours tonight trying to sort it and its still doing it. Nothing is loose, they are all tight and in fine.