ktperry Posted January 6, 2005 Share Posted January 6, 2005 Thermostat Remove the two 12mm bolts that hold the top thermostat housing to the intake manifold. On turbo models, disconnect the AAV hose from the intake manifold. Remove the AAV and thermostat housing as one unit. Scrape away any old gasket material. Remove and inspect the thermostat, boil it in water to see if it opens at its specified temp. It’s always a safe bet to replace with a new unit. Whats the AAV? Thanks Quote Link to comment Share on other sites More sharing options...
Skip Posted January 6, 2005 Share Posted January 6, 2005 Auxiliary Air Valve controls idle speed during warm up on MPFI fuel systems Idle speed regulation on an FI engine is basically a controlled vacuum leak - this is the control unit. Quote Link to comment Share on other sites More sharing options...
RallyKeith Posted January 6, 2005 Share Posted January 6, 2005 auxiliary air valve You must have a Turbo car. On the Turbo car with the Multi Point Fuel Injection the AAV is built on top of the Thermostat. To get to the Thermostat itself you are taking off the AAV. It has an electrical plug on the top of it and a hose to the intake manifold on one side and a hose to the intake air hose (pre turbo) on the otherside. Keith Quote Link to comment Share on other sites More sharing options...
ktperry Posted January 6, 2005 Author Share Posted January 6, 2005 someone once told me that was the coolant temp sensor. if its not wear is the coolant temp sensor loacted at. Kevin Quote Link to comment Share on other sites More sharing options...
Skip Posted January 6, 2005 Share Posted January 6, 2005 the CS is also on the goose neck housing see the other post where you asked this Quote Link to comment Share on other sites More sharing options...
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