I have a 1993 Nissan Altima 2.4liter engine. Developed a miss and did a full tune up. Plugs, wires, cap, rotor, fuel filter, compression test all @160psi. No codes at present time. Number 3 cylinder missing at idle and seems to clear up over 2500rpm. Replaced injector checked for vacuum leaks still same problem. O2 sensor is showing rich all of the time at idle and.5 volt and will go into operation as it normally should as long as rpm stays up. Once rpm is lowered miss returns. Any help would be appreciated.
Monday, May 21st, 2007 AT 7:04 PM