I have a 89 240sx with the KA24E motor, and am having a problem. I have diagnosed it to the number 2 cylinder not firing.
Here is what I have done so far.
-Replaced plugs. 1,3,4 looked ok, 2 was wet with fuel-New wires, cap, rotor.-Checked computer codes - 55, no malfunction-Replace fuel filter-Switched # 1 and 2 injectors-Checked compression - 140 or more on all cylinders-Checked injectors for leaks, don't see any.
It still idles bad. I can pull wire off number 2 plug, and motor doesn't change, where if I pull 1,3, or 4 wire, motor runs really bad. Pulled new plug on 2 cylinder and it's wet. Car starts fine and idles at 800 rpm. Just kinda sounds like a v8!
Can a vacuum problem cause a loss of one cylinder? What am I missing? Is there anything else I can check?