THis is a spark issue. I don't know when you changed them or what you used but FMS wires with the Autolite double plats should work great. About $75 for the combo.

-'96 SE MTX 3L -'98 SVT 1,173 of 6,535 -'05 Mazda 6s, loaded, g/f's ride -Need a 96-00 manual on CD? PM or email me