93 s10 4.3l losing power only when driving and the colder it gets the worse, but when it is park the engine can rev up perfect. trying to get on highway was a disaster, wouldnt get up yo 55. got code 35 (idle air control) and 44 (O2 sensor), i changed both and get same codes and didnt change the power loss
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Had the same problem with my 91 iron duke changed every sensor and then the water pump and alternator went, eventually i had to change the rad it was basically falling out and when i looked inside it was plugged not allowing coolent through. i put one out of a 4.3 in it Its never ran cooler or smoother since! It solved all the loss of power and bucking problems.
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