Also, check the heat riser on the exhaust manifold. I had a similar problem with one of my cars and found that the heat riser had frozen in the closed position. As long as the car was running on the fast idle cam it was okay. But as soon as the rpm's came down when the car warmed up it wanted to stumble and ran very rough. I freed up the heat riser and it is running as it should again.
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Save yo Confederate money, boys, the South is gonna do it again!
Pecosbill
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