Well, it seems the miss is back. Very noticable between 1500-2000 RPM's. Also I've noticed the car pinging when I'm going up a steep incline under load. Plugs/wires are good, fuel filter new, and my last tank of gas I've dropped in a can of B12. Should I check/clean the EGR system?? Any ideas appreciated.

'96 Contour - Zetec/MTX 130+k mi. White/tan Tints, 2.25" custom magnaflow catback, tach cluster '86 Mustang SVO Red/Sunroof 80k orig. Needs work Cone filter, E6 Manifold, '01 16" Pony Wheels