96 4.0L I6 4x4 sport
anyone know where i can find a vaccum diagram?

 

if you go to google.com and then click images and then search for "cherokee vacuum diagram" alot of them pop up.... if you still cant find what your looking for then let us know exactly what your trying to figure out. theres vacuum for pcm theres different vacuum systems so need to know what your trying to figure out

 

cool ill check it out
when shifting to park or neutral from gear rpms drop then go back to normal, but doesnt do it when i put it into gear. i posted another thread about od(overdrive) not working all the time, and someone pointed me to the kickdown cable which i adjusted, and it did move a little, and to check my vaccum lines. rpms are fine anyother time and dont drop or jump.

 

did you look on the firewall its there on my 92

 

edit: nevermind

here you go

 

I won't deny the possibility of a small vacuum related issue but this sounds more to me like a TPS/IAC/Throttle-body scenario...

Clean your throttle-body and IAC first. If that doesn't help (but it will still be beneficial) then move on to TPS check-out, with OEM sensor replacement if needed...

 

thanks again this site is great glad i joined! but could sensor be faulty and with no cel(check engine light).

 

Absolutely