Auxiliary Air Valve question |
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Auxiliary Air Valve question |
torakki |
Feb 1 2024, 07:41 PM
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#1
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Newbie Group: Members Posts: 43 Joined: 5-October 18 From: Nor Cal Member No.: 22,545 Region Association: Northern California |
This is on a '74 2.0. This car's been on and off the back burner for a number of years. (To many cars). It now runs very well, "Except", when it's cold, it idles perfect. As it warms, (about 2 minutes) the idle gets faster to about 1800 rpm. After a 15-to-20-minute drive, I shut it off. Restart a few minutes later and the idle is slow to wont idle fast enough to keep running. So, I'm checking the Auxiliary air valve (I took it apart) and when it's cold, it's open halfway. When it gets warm, it closes. Shouldn't it be opening when warm to let in more air to keep the idle speed up? In other words, lean out the mixture? I would think, when cold, it should be closed to richen up the fuel and warm, open to lean out.
Am I 180 degrees off? Thanks for any input. |
emerygt350 |
Feb 2 2024, 07:30 PM
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#2
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Advanced Member Group: Members Posts: 2,132 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Did you read my posts? This is a known issue. It's normally just confusion on the part of the ECU. Messages from the sensors not matching reality. It happens to me (although not so badly I care) every time I run to Wegmans for something quick and then hop back in the car. It normally takes a minute or so of driving to get it happy again.
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