'93 dakota, 3.9, throttle body, 2wd, auto trans, air cond. (still works fine), 233,000 mi. Runs great, doesn't burn or leak oil. After 7 to 10 miles on a hot summer HUMID day it starts to buck, backfire, and finally stalls. Wait an hour and its running great again. No trouble fall, winter or spring. Just problems on HUMID summer days. Thinking about sending it to AZ. Over the last three years, I have done tuneups, plugs, wires, dist cap, coil, battery
cable connectors, computer, and most recently a fuel pump. It starts fine in the humidity, but stalls out at about 7 to 10 miles. I believe it is only a condition that occurs when it's running since it always starts and runs long enough to get me to the boonies or the middle of the interstate.