I own a 93' b2600i pickup. It has 173,000 miles on it and still runs great. The only problem is that on cold mornings the high idle ramps up to about 2750 rpm and the motor smokes like crazy. After it reaches normal operating temperature it idles and runs normally. I don't have a problem with it in warm weather and it doesn't burn any oil. Is there anyone out who has run into this problem?