My iacv has been acting up i cleaned it and replaced it with a new one. But still no success. It ran good for a couple days and idled good also then today it started acting up again. So i pulled over and the idle was around 400 so i unplugged the iacv and nothing happened the idle stayed the same then i plugged it back in and it started working again. the idle went up 1000 so i shut the car off reset the ecu or ecm whatever it is by pulling the backup fuse. Then i waited started the car and the iacv quit working again so i just drove it home and parked it for now. Any help would be appriated

 

I would check the wires, they could be corroded and not making contact.

 

Could be your fast idle valve, located under the throttle body.

 

cleaned the FIT valve and adjusted it.

i dont understand i thought this problem was fixed it was running good for the last couple days. Then it started again.

and the wires are wrapped in electrical tape so is the harness. Should undo all the tape and trace them back?

 

Check the voltages first... I'd not undo the wire tape unless really necessary.