LPGC wrote:
One of the supercharged Rangerovers I converted years ago came back for sorting recently, the owner said he'd been messing with the calibration and had accidentally cocked it up, brought it back for re-calibration when he couldn't calibrate it right himself. First thing I noticed when I opened the bonnet was a big sticker for Brisk spark plugs, so my immediate thought was the plugs might be the biggest issue. Luckily though in this case the Brisks seemed to work fine, the problem really was a simple case of him messing up calibration. But special plugs not recommended by the vehicle manufacturer are the cause of a lot of problems, Brisk no different. Best part of an hour re-calibrating and it ran fine, but I might not have expected that.
I'd be equally happy to fit those that worked well in the past or the NGK ones, I wouldn't go out on a limb for plugs that were not OEM recommended or hadn't already proven to work well, expensive gamble.
Simon
There has been reports of some of the off brand ones falling apart in the past (the electrode falling out if I remember correctly).