Engine Performance problem
1992 Mazda 929 6 cyl Two Wheel Drive Automatic 157000 miles
1992 Mazda 929 car bucks and misfires after driving approximately 130 miles. After resting, engine works fine for a time and misfires again. Steps taken: replaced spark plugs and cables, fuel filter, distributor and rotor and ignition coil and module. Mechanics were unable to detect any problem.