Blinking engine light and bad misfiring led me to Renting a code scanner and got the following show up-
Cylinder 4 misfire
Ignition coil d primary/secondary circuit
System too rich bank 1
System too rich bank 2
Evaporation emission system high purge flow
Cylinder 4 misfire detected

I changed my plugs, coils and purge vapor canister then cleared the codes I started the car and it was running good again, went about a mile down the road stopped and went to thrn around and the car started misfiring and light flashed again . Now when I scanned this showed up -
Crankshaft position camshaft position correlation bank 1 sensor b
cylinder 4 misfire
Evaporative emission system high purge flow
System rich bank 1
Bank 2
cleared the codes again and the crankshaft sensor code dissapeared but the other 3 still remain and car is misfiring and running rough please help

 

Sorry forgot to include what I'm driving, it's a 2010 cts 3.0 with about 160k on it