Working away on the '78 Z. When driving I have 2 bothersome problems:

• accelerator is sticky, rather than smooth as I depress it with my foot
  
• speedometer is jumpy and erratic when cold, then just a bit jumpy
  

Are these problems related to old cables?

Davey G

Speedo cable could probably use a lube. That is generally the problem in most old cars that I have dealt with. I say most, because it has been a worn out speedo also.

Dont know anything about EFI, is there a cable? My carbed 260Z has rods and ball joints - for a lack of a better word. I'll bet that some WD40, followed by some lube would do wonders on the pivot points of your system.