Cadillac Seville / Cadillac Eldorado Forum Discussion, Anyone else's gas gauge ever do this? in Past Cadillac Vehicle Discussion; I went to Chattanooga this afternoon to see a movie with a friend. When I left the house I had ...
I went to Chattanooga this afternoon to see a movie with a friend. When I left the house I had just under a quarter tank of gas. I knew I would be pushing it but I could go there and back without having to stop and fill up. It's about a 50 mile round trip. Well on the way home coming back down the interstate I noticed that my gas hand was RISING. By the time I got back to the grocery store up from my house the gauge was up to about 2/3. When I started off again, the hand started rising again, only faster now. From the store back to the house, about 2 miles, it was pegged out at full. I parked in the driveway, level, the gauge dropped around 1/4 then right back to full.
While filling up I turned the switch on to see how the gauge responded. It was working as normal. So, I'm hoping that this was a one time freak occurrence. Anyone have any ideas what may have caused it?
Don't drive too long with malfunctioning sending unit. If you run out of gas, you will have a chance to fry your fuel pump. Fuel pump is cooled down by gas.
My 99 deville has a bad fuel sending unit. it stays at full almost all the time and sometimes between 15~18. I just drive it until it hits 200 mile trip after fill up. Then I go to gas station and get full tank.
The tank is 18.5 gallon I believe, so unless you are getting below 15 mpg all the time, it should go more than 250 miles per one tank.
Good... The FSM states that if it's a history code replace the fuel sending unit. Unfortunately I believe your 99 Eldo requires that the fuel tank be dropped to change the sensor. So you want the tank fairly empty to make it an easier job. The latter model Caddys' have an access plate in the trunk to access the pump and sensor.
I know a guy that has a shop in town so I'll give him a call tomorrow and see what it might cost to have that replaced. Hopefully not too bad since I need to have the coolant changed as well. It's always something I guess...