My friend wanted me to post this question for help. I tried search & I showed him the results but he still wanted me to post his mods & his problem just in case its part of the problem. thanks

I'm having problems with my car can anyone help? I have a Fully
built LS/Vtech with JDM CTR Pistons, shot peened ls rods balanced bottom end
and a lightened flywheel. The head is a JDM B16A , with the WEB kit, that
includes ( titanium retainers, dual valve springs, stainless steel valves)
the head has been minorly opened up on the intake and exhaust ports. I have
a ITR intake cam and a GSR exh. cam. Adjust. cam sprockets made AEM and a
B&M fuel pressure regulator, (set to 41psi) and cam sprockets advanced 4
degrees both intake and exht. I also have a Type r intake manifold with a JG
over bored throttle body, a AEM cold air intake, also a reprogrammed civic
ECU w/ Mugen program ( OBD1).A stock GSR header, with 2 1/4 inch straight
pipe (no cat) with an Apex N-1 muffler.
Anyhow now that I have bored you with the mod's I have. I was
wondering if some one can help me with a problem I seem to be having w/ my
Integ.
The Idle on my car is real jumpy and high. It's idling at around 1600 RPM
and it goes up and down up and down from between 1400-1600 RPM . I'm
thinking it's a vacuum line that has been cut or popped off , but I could
find anything.??? So next I cleaned out the valve that sits just behind the
intake manifold , it has a sensor hooked up to it. That didn't work, so now
I'm looking for all your help, what could it be.??? Please Help..... w/b any
and everyone