Jackbat

I use my '77 280Z to commute about 80 miles per day. Never have any problems. One of the most reliable cars I've ever owned.

It's worth a shot, lol.

I had the same problem. It turned out that my fuel injectors were leaking (and others not letting enough fuel in, leaning it out to much.) Check you plugs. If they are fouled (rich) or white (too lean,) you should buy a remanfactured injector from an autoparts store. (usually about $30.) Replace the injector at one of the messed up plugs, and the plug itself. If you notice a difference in how it runs, its a good bet that you have some bad injectors, and can go ahead and replace all 6. I replaced mine one at a time, and everytime it got slightly better until I replaced the final 2 injectors and it fixed it complete;y.