I have a 2001 Ford F150 that has been bucking and missing for about 4 months but never had service engine soon light come on until today. Got it read and it says #3 misfire which I know that is another coil pack. But I would like to change it myself? Is it hard?? Do I have to remove anything? Looks like it might be kinda tight?? I don't know where to find directions on the web! Please help!!!