Hey scotty I have an 2003 mercury sable dohc 24 valve just put in a new power steering pump, ac compressor, ignition coil with new spark plugs and spark plug wires. The car has 45k original miles car has poor acceleration and bad shifting, I have to release the gas pedal in order for car to shift and engine has a burning smell and ac blows fan only.... Any suggestions on what's the problem?