The ac started blowing cold driving in the highway and stop when idling .. I'm never mess with ac just what I read or seen and taking advice from shade tree mechanic.. I pour the oil out of the old compressor and rubbed between my fingers it felt smooth.. I may go ahead and flush the lines and evaporate and condenser.. Does that have an auxiliary electric fan right behind the radiator? If it does I would check to see if it's working. Probably has a small transistor type relay that's probably bad. If it's cooling going down the road but stops when sitting still it doesn't have enough air flow across the condenser. It is still a good idea to have the system evacuated before recharging. Moisture in the air can cause problems down the road.
"Follow me the wise man said, but he walked behind"
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