I am having an issue with my 82 camaro z28 5.0L with cross fuel injection. I need some help with the vacuum hose lay out, the hoses were not on the vehical when i purchased it. In idle it jumps between 500 and 1500 rpms. Does anyone know how to deal with this cross fuel injection?? Please help me out

 

you need to try to find and fix any vaccum leaks. they are common around the intake and 2 tbs. thats a good starting point.
matt