foreverdeath

ok guys so im stumped on my s13. every since i got it ive had an idle issue right now is the best i have ever got it. right now when you left of the gas it hang around 1200rpm and may climb upto 1400rpm then a a few seconds later it go down to the normal 750. ive been hunting a vac leak for ever and timing is on spot. now i dont think its a vac leak after i have latly be testing it by pressuizng the manifold and liseaning for leaks. today i evening tried cleaning the maf which didnt really help. one thin that confuses me is that if i on plug the maf the idle issue goes away. specs are as is: rebuilt KA24de (2600miles, 248/232 cams, p2r thermal intake gasket, egr/pair/emissions delete, no powersteering, obx header, and no name clod air intake. i have been looking at also with nissan datascan and im just out of ideas. would attach a NDS datalog but i cant find the file outside of NDS. i have no clue where the low power thing had come from but it kinda random and seems to cut power around 3-5k rpm almost like its pulling a shit ton of timing.