 Idle ? |
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| windforfun |
 Aug 18 2018, 09:49 AM
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Senior Member  Group: Members Posts: 1,779 Joined: 17-December 07 From: Blackhawk, CA Member No.: 8,476 Region Association: None  |
Why does the idle drop by about 250 RPM after the engine warms up? The car is a "73 1.7. Thank you.
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| bbrock |
Aug 18 2018, 10:28 AM
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#2
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains 
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And to answer the question about "why," IIRC it is because when the engine is cold, the auxiliary air valve is open to let more air in and idle the engine faster. After it warms up, the valve closes and the idle settles to what you want it set to. It has been decades since I've messed with D-jetronic so I'm sure someone can verify or correct this.
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Posts in this topic
windforfun Idle ? Aug 18 2018, 09:49 AM
The Cabinetmaker Adjust idle after it's warmed up Aug 18 2018, 09:52 AM rhodyguy What is the RPM after the drop? Aug 18 2018, 10:15 AM
dr914@autoatlanta.com closed points, turned in idle screw, leaking press... Aug 18 2018, 10:48 AM |
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