KA needs help

[scott]

i have a 93 240sx with 110,000 miles. it misfires alot and the revs dip way down when i push in the clutch coming up to a stop sign. somtimes the car actually dies coming to a stop. the car surges a little and just doesnt have near the horsepower it did when i first bought it. there is not a check engine light on. i have put on plug wires, plugs, fuel filter, air filter, o2 sensor, coil, cap but not rotor button until tuesday, cleaned AIV valve, and ran fuel system cleaner in it several times. i did have a couple vacuum leaks but i fixed them over the weekend. i cant think of anything else to replace and need help.

[sx=moresex]

sounds to me like your timing could use a looking at or a new MAS (Mass airflow sensor) could the the resolution

[scott]

i advanced my timing a few months ago. it made my idle a little bumpy but i gained A LOT of power so i left it there. as far as the mass air flow sensor i guess it may be a problem, i have accidentaly shocked it with a disconnected spark plug wire a time or two but the car still ran like normal after it happened. that was late last year.