I recently purchased a 1983 280ZX that has been sitting for a long time. I know a little about cars and engines but not much. I replaced all the rubber fuel line, filters, and fuel pump. That got it running. It has a 'skip' in the engine which is most noticeable when accelerating. I believe an injector may be clogged or malfunctioning. Is there a way to be sure or chek which one?? Is there a rebuild kit available?? The other problem I ran into the other night. While coming home my poor Z just died on me! It sounded like the fuel pump was laboring. If you gave it gas it would backfire and try to shut off. I checked the intake filter located in the gas tank and it appears to be ok. Someone posted something about a fuel regulator?? When you turn the ignition to the on position you hear the fuel pump pressurize the fuel line, but it sounds a bit labored and really low pitch. Normally it sounded high pitched. Can anyone help with some ideas?? THANKS!!