I have a 2001 V70 T5 130K miles and occasionally it will idle rough at start up (approx 5-10 seconds) mainly ntice when car has been sitting over night or several hours. Recently changed plugs and problem still persists. Happens about 1 out of every 6-10 start ups. Could it be caused by Cam position sensor or solenoid??? Any thoughts????

Thanks!!!!!

 

Most likely need to clean your ETM.