I had for making some improvements on the engine harness with the idle Manage valve. I had at first planned to work with a two wire bimetallic kind valve, but I are going to be utilizing a Screw-in model idle Management valve. This valve makes use of a stepper motor https://toyota-4a-ge66420.jts-blog.com/37952088/getting-my-4age-for-sale-to-work