high idle 79 zx

[steve thompson]

 hello all. just joined club. Still figuring out whats what.  I just bought a 79 zx. It had been sat indoors for about 12 years. 120k only

Put a new battery in it and drove it about 40 miles home. Will not idle below 2000. I cannot find any air leaks, the idle screw on the AFM is fully in ? if I let it out rpm goes to 3000 or so.  Before I start messing with anything, does anyone have any obvious things I should look at?

The idle is the same hot or cold, any suggestions welcome, Steve

[Dave WM]

easy stuff 1st check throttle plate not hanging up

then the AAR valve

Not sure about 79, but if they have it the BCDD check the BCDD.

down load a factor service manual and study the fuel injection system.