So, i have a 84 fb n/a and it idles around 2k and is running rich. I had read that the hose from the exhaust to the intake box can cause a vacuum leak. Mine is on but not tight. Can this be part of the problem and tuning be the rest? And how do i know if i have a nikki carb or not so i can figure out how to tune it?

 

welcome to the board.

you're probably right in that you're dealing with a vacuum leak. however, that hose is not it. get a copy of the FSM from Foxed.ca or search for a thread that has a copy of the vacuum diagram, then go ahead a replace all the vacuum lines. it's probably due time for them.

 

thank you! before I get to crazy is there a test I can run for lack of vacuum or is it just trial and error?

 

I use a can of carb/choke cleaner. Spray it at potential leak areas. If engine speed increases, there's a leak there. Others use propane in the same way. Good luck.