sounds like you may have a weak coil. or you could havv possibly got the wrong plugs a hotter or colder plug could make a difference as well but it sounds like when the coils are under a load you have one not putting out enough voltage.
^exactly what i was gonna say.get the codes read anyway. i have an 02 F-150 with 120k+ and the last time a coil went out the computer stored a misfire code without setting off the check engine light. i replaced that coil and it runs fine again
im pretty sure im smarter then that, and im sure the problem would be more severe, ill try advance tomorrow thxs
isn't it hard to get the cop's on the wrong plugs on these cars? Its not like you have alot of slack to play withperhaps you put the wires on the wrong plugs?