Hi I have a 1990 300zx na atx and it was recently vandalized among other things the ecu was stolen. I bought a replacement from this guy off ebay and was told it was a 300zx ecu and that it worked in a 300zx same specs, after researching the codes off the ecu come to find out it is actually off of a j30 na atx. I asked around at the 300zx forum and all over the damn place, no one can answer the simple question of will this ecu actually work in my 300zx? It plugs in perfectly and powers up, but I can't tell if it works because my car cranks over but won't turn on, and it may be this or maybe another part I replace. I asked the guy he swears up and down it worked in the z, but I don't know if his information is valid, after all he made a mistake but the price for it was fair. I thought I would ask because there is plenty of people on this forum so I figured someone has to have tinkered around with something like this.