I'm having a problem with my 78 - 5 speed. When stopping, the engine continues to be at around 2000rpm till I hit the accelerator pedal then it goes down to idle (800rpm). I have no clue on how to fix this problem. Thanks in advance for any help.

 

Hi------I will try to help you with your question----However I am not the biggest 280Z car guru-----------The 78 280Z is a fuel injected car which means it has all the wonderful-----gizmos and dodads that go along with that system-------That symptom you speak of is a common Z thing----------Tell me how long does it stay at 2000rpm if you do not blip the throttle?? Which style do you have(Federal or California model Z)? From what you have stated I can only lead you to the unit that is located immediately below the Throttle Body-----If i remember correctly is has some initials like BAAC or something similiar to that--------Its main goal is to keep the engine at a higher rpm for a few moments to help burn raw fuel when the throttle is closed-------the Z and ZX normally aspirated fuel injected cars had these units on them to help the Z's pass emissions------------If your problem only lasts for a short few seconds than naturally falls to 800rpm than the unit I am telling you about is operation fine-------It the rpm will not drop at all tell you blip the throttle than I would assume the unit is failing and you would probably need to replace it--------If you do need to replace it I would first check prices of a new unit or remanufactured unit than check the salvage yards for a cheap test subject--------If you do not have a good manual than get yourself one------cause this unit I tell you about is described in a Haynes manual---------Unfortunately my manual is off at my shop so I can not reference it for you-------------good luck