1986 GMC C7000 C7D042 8 Cyl 10.4L
lose power and mis fires sometimes
when it loses power when giving it the gas it misfires sometimes. Could old gas cause this problem? could I clean fuel with fuel cleaner or do I need to drain gas?
First you should verify if there is a stored troublecode in your vehicle. You can navigate this link http://www.extreme-check-engine-light-codes.com... to have an idea how to extract stored troublecode in your vehicle without using a scan tool.