u/3elmanx3

1989 nissan d21 (z24i) idles really low and sometimes dies when cold, when up to temp it idles up and down randomly, throttle is jerky while driving. I’ve replaced spark plugs, spark plug wires, distributer cap and rotor, i couldn’t find any vacuum leaks, it has small exhaust leak but it’s at the end near the muffler. Any input would be extremely helpful. Thanks