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Classic/Antique Car Repair/1956 Cadillac Fleetwood Sixty Special

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Expert: - 9/23/2008


Question
Caddy seems to idle high while in Drive ... wants to take off @ stop signs I have
to hold her hard with brake. unless I shift to neutral, then she idles down.
any idea wat is causing the high in gear idle & slower neytral idle?

Answer
High C E:
Normally she should idle down when in drive. I think you may have a stuck automatic choke that's not kicking down after warm up. It may just need spraying with some WD-40 or better yet, some sillicone spray or it could be a bad air/fuel sensor that needs replacing.

Once a car warms up, the automatic choke will automatically drop down when you hit the accellerator hard and release quickly. It acts like a plunger when you do that and it releases the preset throttle that causes a high idle during warm up.

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Vern Bullock

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Visit my website at: http://www.classytransportation.com/ I can answer most questions about autos built in the 60's 70's and 80's. Specifically, Lincolns, Rolls Royces and the Excaliburs. Mechanical issues and technical questions are my expertise. I also have a general knowledge of most older automobiles. Keep in mind, I can only provide answers if the questions are very specific and complete. Without details, I can only speculate and that's not good for solving your problem.

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I have owned and maintained Silver Shadows for over 10 years now. I find most mechanics and even Rolls Royce mechanics have very little knowledge about these automobiles. I have researched these cars in quite a bit of detail and can pretty much tell you what is wrong, if you can describe the behavior in detail. I have saved quite a few RR owners a lot of money and aggravation due to improper diagnosis. I am the owner of Classy Transportation, LLC a luxury limousine service specializing in antique cars, classic cars, vintage cars and exotic cars.

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All around the Internet

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I hold a BS degree in computer science and a MS degree in mechanical engineering.

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I regularly compete at car shows and average around a dozen awards annually.

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