I have a 1996 mustang gt 4.6 (it has a cai, pullys, trick flow plenum, x pipe cat backs, and a few other small things) a couple months ago I put a bbk cai on to replace the old ratty cai that was on before and for awhile it was fine. A week later it started idling at about 2k-2500 and sometimes past 3k, I replaced the tps two times, the iac, egr, maf, checked for air leaks, cleaned the tb, put the old cai back on and none of that worked. The only time I ever fixed it was when I reset the computer by disconnecting the battery and pulling the fuse but slowly the high idle would come back. I also bought a bama tuner and the made everything normal for a bit the the idle came back again so I returned it back tO the old settings before the tuner and it went back to normal again, but again for only a couple days. I've researched this like crazy and tried everything and still have not fixed it. So help would be much appreciated.