Ok I have a 77 280z and she fires up pretty good (idles a bit low) but after a short time maybe 5 minutes and giving it some throttle she starts to putt out and will die. It starts to sound like it loses a cylinder and even giving it throttle starts to have no effect.
So what happens is the spark plugs are getting wet. I pull them out and are covered in dark liquid thinking oil or bad fuel. After I take them out and clean them and they are dry. I can put them back in and she fires up again. She does spit out a little bit of black smoke also possibly running rich?
I am thinking to change fuel pressure regulator and check the injectors.
Let me know what you guys think, am I on the right track, way off, or close but you have something else you think I should check. Any and all thoughts will be appreciated.
Thanks guys.