I have 92 B13 with a new fairly new IAC but when I disconnect the TPS the base idle goes to 1200 rpm and I can’t adjust it down, could this be from the fuel regulator being bad or the secondary air regulator, the iac regulator being bad? Tried to get a smog and the guy failed me for 12 degrees and he never even put it in base timing.
My car is not my car, it is my daughter's. 1991/09 Sentra J vin 1.6L 20 over bore, tranny 5spd swap, Nx2000 disc brake swap, almost complete. now we need new wheels and tires.