02-06-2022, 09:45 AM
Hi
The only time I had 14 mm plug related troubles was a one week holiday in Jersey when there was an unseasonably chilly Easter (easterly winds, hailstorms etc). The roads there aren't conducive to a good long blast, so the car never properly warmed up, and the plugs were prone to fouling and misfiring. The standard A7 ignition doesn't seem to have a lot of margin, and doesn't take kindly to carbon fouling.
Modern plugs don't seem to always respond to cleaning, and a new set is sometimes the only cure.
There have been reports in the past that NGK plugs are a popular target for counterfeiters, so this may have undeservedly detracted from their reputation.
The only time I had 14 mm plug related troubles was a one week holiday in Jersey when there was an unseasonably chilly Easter (easterly winds, hailstorms etc). The roads there aren't conducive to a good long blast, so the car never properly warmed up, and the plugs were prone to fouling and misfiring. The standard A7 ignition doesn't seem to have a lot of margin, and doesn't take kindly to carbon fouling.
Modern plugs don't seem to always respond to cleaning, and a new set is sometimes the only cure.
There have been reports in the past that NGK plugs are a popular target for counterfeiters, so this may have undeservedly detracted from their reputation.