Question about 2008 Chrysler Town & Country

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How to adjust the engine idle - 2008 Chrysler Town & Country

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This is all done by computer control. If its idling to high or low look for a vacuum leak. You could pop out factory tab that covers the screw screw but id leave it. Something is making it idle wrong. Go to auto zone and they scan it for free with computer and tell you what is cause to the idle issues.

Posted on Jan 23, 2013

Testimonial: "Thanks Joe. Makes sense as I just had it at the dealer over the weekend and the initial issue they discovered was a vacuum leak. They replaced the head, head gasket and pcv valve as the fix. I was getting a check engine light, intermittent electronic throttle control and skid control lights as the catalyst to take it in. It sounds like they didn't get the vacuum issue totally resolved?!?"

  • Joe Lamb
    Joe Lamb Feb 09, 2013

    Sounds exactly right. Hope you get it resolve. If you have anymore questions feel free to ask.

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Idle adjustment at carburator end


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Hello I have a 1980 Ford Bronco 351 2bbl. Wondering if anyone knows which screws adjust what? Please if anyone has any ideas please respond. Thank you.


Here are some images that might help to assist you, and let me know if you require any further assistance.


Adjust the curb idle with the engine warmed up and the choke off.

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The air/fuel mixture screws should be adjusted with the engine warmed up and at normal idle speed, then turn each air/fuel mixture screw in one at a time until the engine just begins to mis-fire, then back the air/fuel mixture screw out 1-1/2 to 2 turns out a half a turn at a time until the engine idle is the smoothest. (your vehicle might have restrictor caps over the air/fuel mixture screws to limit the amount of adjustment)

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The choke adjustments;

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To adjust the vacuum tension pull on the choke pull-off:

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Adjust the fast idle screw to the proper RPM with the engine cold and the choke on.

cadcd19.jpg

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On any carburator,one screw is for the idle speed, the other the air/fuel mix.Start the engine and let it get plenty warmed up. Adjust the idle screw to make the engine run slow. Turn the air/fuel screw in until the engine starts to die then out till it starts running loady.You want the screw between these two locations. Adjust it till the engine runs the fastest. Now adjust the idle speed screw to about 1000 RPM.
I hope this helps you.

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