hi my 1995 mitsubishi colt 1.6 glxi (4g92) has developed a misfire above 1500rpm. i have changed the plugs , leads , distributor, rotor arm and still same problem. i disconected the maf sensor and car ran a lot better so i replaced the maf thinking it was faulty . however fitted the new one and same problem ocurs, any help would be greatly appreciated as i need to get the car on the road asap,