Tobyspaw
01-30-2016, 07:41 PM
Hi, I've been getting the po1391 code lately. At a red light in gear ,idling. The RPMS will drop and stumble occasionally. I reset my CELL with my code reader. Seems that somethings not right. Is it a cam sensor or crank sensor? Also an maybe related,I took the crank sensor off just to have a look and noticed the shaft has some play in it. Is that normal?