Thread: Idle problem
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Porschephd Porschephd is offline
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Join Date: Aug 2002
Location: OverlandPark KS (Kansas City)
Posts: 530
I have heard someone repairs them but do not know who or have seen it. The AAR should be more open when cold and almost closed when off. The 12 volts supplies the bi-metal strip and the unit starts to heat up closing the door off to control idle. When you shut the car off it and it cools it will go back to an open position. So when you cut power the unit will go back open on its own.

You can bench test it by hooking 12 volts to it and seeing if in a 5 minute time it closes off, or at least all but a little slit. Some use a half moon shape and some have a slit as it closes and that remains the only open spot. That all depends on the year, Bosch number etc.
94 3.6Turbo 6-speed AWD
Old 01-06-2009, 03:01 PM
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