rosskj

I know you said stock engine. But if you have an aftermarket electronic ignition (to replace the points and condenser) it's probably failing on you. Some people put 280zx distributors in 240z's. The distributor module on the 280zx fails under higher temps after it gets old. Once it cools off, it fires again and runs fine until you get down the street. I had an '82 280zx that did this. And my '73 240z did this too. (and is currently doing it, I haven't fixed it yet). Drove me nuts on the '82, until I found the new distributor module $99-$220. I didn't even think about it on the '73 until I went to change the distributor cap (thinking it was moisture). Then there it was... the wrong size dist. cap. and the little black box on the outside of the distributor. I plan to put a stock 240z distributor in it with a pertronix electronic ignition kit. In my opinion, the 240z distributor with the pertronix drop in kit is better than the 280zx distributor. And if the pertronix goes bad, it's only $30-$50 to replace. Good luck Ross Oh, btw, I put a pertronix ignitor in my '72 and it runs great! Get their coil too. (I don't work for them, I just respect their products)