300zx idle wont drop?

[sdkid123]

idle wont drop i turn the bolt on the iacv all the way clockwise and nothing idle stays the same my 300zx timming is set to 15 tps is set to 45 i think it was accelerator pedal is not too tight has some slak uhmm idk what else can it bee??thank you

[robomatic12]

IACV could be frozen up/stuck, take it off and clean or do the cheat by pulling hose to IACV with engine running and spraying a cleaner/wd-40.

[sdkid123]

IACV could be frozen up/stuck, take it off and clean or do the cheat by pulling hose to IACV with engine running and spraying a cleaner/wd-40.

Thanks for the help I'll give that a try

[GerryO]

Use a multimeter to verify the TPS output voltage (mine is 0.38 VDC) and test/clean the Air Regulator too. The idle speed screw should be adjusted to maintain an idle speed that is just below the normally ECM controlled idle speed. Set too high with the idle adjustment screw, the ECM can't control the idle speed like it should and set too low, the idle will be too low if the ECM fails.

Did the throttle body heating by-pass on my engine and now minus the length of tubing that heats the Air Regulator, the idle speed doesn't drop unless the car is in Drive at a full stop with my foot on the brake.

http://home.swipnet.se/e-solutions/IdleTech.html
http://home.swipnet.se/e-solutions/IdleTech2.html