High idle in park & neutral. RPM's jump when going over potholes while drving. The idle at start up is around 1500, will randomly do it at startup does not happen all the time. I have replaced o2 sensors, crank sensor, map sensor, tps sensor, and IAC. All parts are OES parts by NTK. I have not found a vacuum leak, removed battery & inspected vacuum reservoir no cracks present. Sprayed all vacuum elbows & vacuum lines, no chnage in rpm. I checked intake & exhaust manifolds bolts & nuts, all are tight. Sprayed brake clean on anything possible, still no luck. I live in an area where it gets above 110 in the summer, randomly while driving I would get no airflow out of vents but you can hear the blower motor. I did notice slack on my throttle cable and plstic broken on it, can this be related to my symptoms?