Recently did a tune up on fiance's car. Did not hesitate before, installed new plugs and wires. Now it has a hesitation at higher rpm's while not under load. If throttle is slowly pressed you can get the rpm's up pretty high w/o hesitation, but if I give it quick burst, or goosing it, it cuts out badly. Took it out on the street and it runs really rough . Old spark plugs were worn but not real bad but the gap on these were around .07 to .08, factory specs are .06. Realizing wear and tear will make the gap larger but by this much? Will resetting gap on plugs a little higher fix the hesitation? Also, in regards to coil packs and ignition module, if one of the components was on the brink of dying, would new plugs and wires put it over the edge?? Help, this car is driving me nuts!