My '99 Bonneville's fuel gauge goes crazy after I fill up the tank. Reads Full, then dances around to empty and all places in between. Until now, it would read full after letting it sit for a night.
Someone suggested that might "clean" the gauge sensor/mechanism by running some injector cleaner, but after 5 or 6 treatments I gave up as it didn't seem to work.
I filled-up a week ago, and the car sat for 6 days. Drove it today and it only read 1/2 after starting and then fell to empty. Repeated the same later in the day.
Any troubleshooting advice?
I've considered just putting in a new fuel pump (since I assume the gauge and pump are in the same unit)... Or should I just add it to my list of things for the dealer to investigate?
If I take it to a dealer, what troubleshooting should I expect them to do?
Thanks in advance- Dave