i have a saph 4x4 i fitted new plugs and put the recomended gap in the plug, test drive for 6 mile very good for a matter of fact it was much better than the old ngk plugs.

6 mile up the road after doing around 80mph it was perfect, now i take a steady drive back home at 55mph and thought shit it isnt going to get me home loss of power taking along time to get up to 70mph but when i got to that it run fine again...

spark plugs are ford genuine part with correct gap i double checked on it.

has my car been remapped or chipped i dont know if it has but would the gap be diffrent from
factory gap...

also battery keeps going flat when the car is left for 2 day's, i found out that the abs unit will pump or make a noise every 15-20 mins why would this be...