A question...my 91 Z randomly started to idle low the other day, around 100-200 after deceleration and it will bounce back up to around 500 where it'll stay. Also, it doesn't high idle any more like it used to when cold. When I open the gas cap it doesn't make a pressure release noise any more either. It'll drive around fine with no hesitation or otherwise although maybe a little smelly it seems now. The motor still runs smoothly and is amazingly quiet now as compared to before it seems also. I've done basic connector check and the harness is new and no corrosion. Injectors all ohm around 13, checked for loose hoses, etc. Do you think it could the the idle air valve? I turned up the idle screw about 1/2-3/4 a turn and it somewhat alleviates the super low idle but it isn't curing the root cause obviously. Any ideas would be greatly appreciated. Thank you in advance.
