I've recently brought a 1.8l gold driver mk2 automatic and I'm having an absolute nightmare with preignition. I happens pretty much every time i switch the igniation off and really bad after I have put petrol in it to the point where it backfires really badly with loads of black smoke. It's rpm seem to be a bit high as well as when standing ticking over it's at about 1200 rpm. If any 1 has got any ideas ior solutions it would be hugely appreciated
Many Thanks
Adam