I have recently noticed that my gas gauge has been acting up on me. I fill my car up with gas and the gauge reads full but after driving for ten miles or so it will read empty, then after about forty miles it will read full again. Then, I also noticed that the digital gauge reads down until I have 50 miles till empty, the warning light turns on but then turns right back off and the gauge reads half full again and I suddenly have 125 miles till empty, in reality I only have like 2 miles left before my car runs completely out of gas. It's not an extreme problem because I normally fill my car up every week and it doesn't get that low but its annoying and frustrating (especially the day I ran out of gas and discovered this problem).
The contact points on the float in the tank are kind of delicate, and completely exposed to the fuel in the tank. The assembly is clipped onto the side of the sending unit. Apparently, your contacts are either dirty or damaged, or a wire is damaged, causing false readings. Not sure if it's something that can be cleaned or not; impossible to tell without looking.
The car is a 2001 and yes, I understand going by mileage but I still would like to have an accurate tank, especially if I loan my car out to a friend or something.
How could I check the sensors? Would I have to take the whole gas tank out or what? And I also have been having problems filling up my tank, I have to sort of hold the filler nozzel partially out in order for the tank to fill up, otherwise it fills and stops every five seconds or so. Could that be part of the same issue?
You can remove the back seat, and there is a rubber plug that covers the fuel sending unit access port. You can open the port, but you cannot REMOVE the sending unit without cutting the sheet metal a little bit - the hole is too small. But this beats dropping the tank underneath ANY DAY.