Dead Cylinder in my J30

[freakonaleash1187]

My 1993 Infiniti J30 started running like crap two days after I put it up for sale. It felt like it was missing a cylinder, so I started unplugging each coil pack and found out which cylinder is not firing. So I first changed the spark plugs, and that cylinder is still not firing. So I then switched around coil packs and the same cylinder is not firing. Then I OHM-tested the injectors, and they are all in spec. So now I am lost. Its not the spark plug, its not the coil pack, and the injector tested good, what else could make a cylinder not fire? Please don't tell me it is something internal, lol.

[Q45tech]

Are you saying the coil is not getting the pulse from ecu or have you not actually checked for a spark extending coil out and a plug externally.

Each coil and injector has a separate driver transistor in ecu that switches ground on and off.

[jwilliams050]

did you ever figure out your problem? I AM HAVING THE EXACT SAME PROBLEM! I ended up buying an ignition module off ebay. And still no fix. HELP!!