Flashing check engine light & car idles low???

thanks, got 2 codes p1521 and p0306, vris '1' circuit, and misfire on cyl. 6

Watch this video for the vris '1' circuit : https://www.youtube.com/watch?v=W3gb-ihNN_4 You didn't specify which engine you had so, I had to guess. P0306 misfire is usually caused by : a bad spark plug or plug wire, distributor cap or rotor. Suggest looking at distributor cap first : http://www.autozone.com/ignition-tune-up-and-routine-maintenance/distributor-cap/duralast-distributor-cap/61311_0_17311/?checkfit=true