Gap should be .035, so if you meant .040, they either lost their gap quickly or were put in that way. I prefer Champion 7034's.Tdog02 said:I put in new plugs from the stealership 5k miles ago. I pulled them out and they were clean, no problems except the gap was now around 40.
So, is this normal? Info: 02 Sport 4.0/auto running fine but mileage is 13-14mpg. 3.73 gears and new 30's.