ValleyGunner

Well, this is interesting. My 91 F150 has dual tanks, and over the last two weeks I have noticed they have been reading incorrectly. Now, both fuel pumps have been replaced within the last 4 months, so I don't think the sending units are the issue. Right now, the front tank is not registering at all, and the rear tank fluctuates. Oddly enough, the gauge doesn't move around while the truck is on. It's more of the gauge fluctuating when the truck is turned on at different times.

I'm thinking this is an electrical issue, maybe a bad ground. Any ideas?