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There's temp sensors that determine how much gas you get with temperature on the electronic side, but the biggest thing on starting is the auxilary air regulator which is the little gizzie in what would normally be the fuel pump hole on a carbed engine. If this gets sticky, you'll have high idle sometimes, sometimes you won't. Serves the same function as an automatic choke on a carb, but normally lots less trouble. Lets additional air in which causes extra fuel to be added to each squirt. Some years were electrically heated, some were purely a mechanical deal. They can be carefully stripped and cleaned, just make sure the valve rotor gets put back in the same position as it was before it was taken out. I had one when I first got my Square that had the shaft bent and was very sticky, like to drove me nuts trying to figure out what was going on. A replacement from the scrap yard really helped. You can carefully adjust the position of the thermo coil on the mechanical ones for the desired effect on cold starting, too. I've had little experience with the electrical ones, can't help you there if you've got one. The thermostat you're looking at doesn't have any effect on idle, it's strictly a cooling system thing. > >Well everyone my fastback is running better now than it ever has thanks to >everyone's advice. My next problem is in the mornings. I start the car for >the first time, somethimes I get high idle for warming up purpose other times >I need >to keep my feet on the pedal for a few minutes. Is this normal? I mean it's >only been about 55 degrees when I start it. What determines the idling for >warm up purposes? The fuel injection computer? The thermostat(looks like an >stack of pancakes)? Help would be cool. > >Thanks > >Rick 69' fastback FI ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe