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Couple of questions about 1929 DeSoto K


GaryBudd

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Your entire problem might be your needle and seat.  If it sticks and you are driving the mixture is too rich and will smoke.  Easy fix.

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Replace the needle and seat either with a NOS or modify a later one to fit. I fooled around with mine for a couple of years and then my tune up guy modified an early 60's one to fit my Marvel carb and it has been trouble free for 50 years and 400,000 miles.

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