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BigWorm
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May 2002

Re: MicroTech & Idle Speed Controller Valve on 1JZ	Tue, 26 August 2003 16:13

It's possible & even easy to create a switchable device that could be manually controlled or hooked up to operate automatically, but it will either be on or off, open or closed, whereas stepper motors, & in my case the 4AGE has a thermal wax pellet controlled valve arrangement that has coolant circulating and the warmer it gets the closer to fully open the valve is, these provide a gradual or stepped movement from open to closed. Which requires a variable input, either directly from coolant temp like the wax pellet or electonically through a water temp sensor (and whatever else they want to hook up to it, A/C, power steering etc) & then out of a computer as a varying voltage to control a stepper motor, which the microtech is unable to do. I'd be interested to hear the results of a simple switched valve, as I wanna get rid of my wax pellet valve but I also have a microtech, so I'm in the same boat as you. Even then, the microtech only has 1 auxiliary output, so hopefully this is the only thing you want to use it for, & even then you'd have to use the AuxFAN function as it's the one which uses a preset water temp to control the output, and then it only switches power on at the prest value, & then off 5 degrees cooler, so you'd need a valve that's open & then closes with power applied or something like that. I'm sure microtech could reprogram it to turn off at a preset temp, but it will never control a stepper motor. I've been meaning to try out a switched idle valve, but just havn't got round to doing it yet. [Report message to a moderator]

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