I have a 2001 santafe with 35000 miles on the clock. customer complains of rolling idle and intermintent 5000 rpm shifts (auto). vacuum = 16.8, co = 0.61 ( I think high for tailpipe ) hc = 164 co2 = 10.2% pcm data stream : throttle % 0.4 airflow GS 4.15 ( I cl... Login to read more.