My girlfriend has a 1990 300zx 2+2 that always drops rpms and sometimes dies at stop lights, when shifting into reverse, and when left idling too long (5 minutes when warmed.) There's also a problem with delayed acceleration when leaving a complete stop. It's sort of like how a diesel has that slight hesitation when you press on the accelerator. I've replaced one broken coil pack, replaced all fuel injectors, replaced all efi-fuel injector plugs, and replaced all fuel and vacuum lines. My day job isn't as a mechanic, so I'm all out of ideas. Any suggestions?
Follow Ups
I've had it up to here! - dontskate18:41:14 05/20/10