When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have a 1988 F-250 4X4 that I have changed both in-tank fuel pumps, high pressure fuel pump, and switching valve. I cannot get the valve to switch over from the front to the rear. The valve is sticking, and won't change. Voltage and pressure have been tested, and checked out. Has anyone had this problem before? Any help would be very much appreciated.