I am suprised about that... I have a 1998 GT with stock coils, and I have been running the Q4's (+4) since I got the car, I have never had a single problem with them, when I change them they are always the color they should be, I get incredile mileage on it, and I still have all the power I should be making. I used to run these same plugs in my truck, but that had a full MSD setup on it.... Anyways, I haven't seen any issues with my plugs on this car...
__________________
// 1998 GT-Steeda Conversion \\ -- Sold
// Now own 2001 F-150 SuperCrew 5.4L \\
|