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    1991 5.7 TBI runs rough when cold

    I must be missing something here, but I am about out of ideas. I have a 1991 c1500 5.7 tbi with 115,000 miles on it. The truck misses for about 30 seconds after start up when the outside temperature is below 50 degrees. I have done all I can think of to this point and need some others opinions...
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