Classic/Antique Car Repair/Carb problems

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Expert: - 3/12/2008


Question
I have a 73 ford pick up and it has a worn out either 360 or 390 in it, i haven't run the numbers on it, runs real good. Anyways it seems though that its all of a sudden running extremely rich and is always running higher then usual. It has a mechanical choke but when the choke disengages it then dies. I've replaced spark plugs, distributor cap, etc. the main tune up. If you could submit an answer it would be very helpful.

THANKS

Answer
Hi Austin:
Sounds like you have an air leak in the air intake valve or a bad air/fuel mixture sensor. This is suppose to regulate idle once the choke is off. Not enough air would mean too much fuel, which would make it too rich. The reason it dies after the choke is off, because it is flooding out from too much fuel. This is my guess. Hope that helps.

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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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Classy Transportation, LLC Limousine Service.

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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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