2000 STS MN Posted October 18, 2006 Report Share Posted October 18, 2006 My next issue: My Gas gauge is flipping out. With previous cars I found this to be a faulty sender unit which was in the gas tank. While I was under the car with other issues I was looking at the gas tank and wondering how it would ever come out. As far as I can see it does not unless you cut out tail pipe protectors. I removed the carpet in the trunk and to great surprise I saw a access panel to I hope the sender unit and fuel pump?? This is my next project and could use some advice on replacing this IF this is the problem. Any tests to preform first ? No codes present for the malfunction. Link to comment Share on other sites More sharing options...
BodybyFisher Posted October 18, 2006 Report Share Posted October 18, 2006 Here is a discussion we had recently about the access panel: http://caddyinfo.ipbhost.com/index.php?sho...hl=access+panel Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
2000 STS MN Posted October 18, 2006 Author Report Share Posted October 18, 2006 Here is a discussion we had recently about the access panel: http://caddyinfo.ipbhost.com/index.php?sho...hl=access+panel I went through the replies, whooooo..... sounds like some fun on the site also! I will have to watch how I state issues. I will purchase a sender and get-r-done. Thanks again Link to comment Share on other sites More sharing options...
steve6 Posted October 18, 2006 Report Share Posted October 18, 2006 mine does the same thing, let me know how much work it ends up being Link to comment Share on other sites More sharing options...
2000 STS MN Posted October 18, 2006 Author Report Share Posted October 18, 2006 mine does the same thing, let me know how much work it ends up being I will report when I get prices and time. Here in Mpls we are racking leaves and getting ready for the SNOW! I am elated that there is an access cover, should go well. Link to comment Share on other sites More sharing options...
kens96 Posted October 18, 2006 Report Share Posted October 18, 2006 Don't kow if this is related but I have a 98 corvette that has had problems with the fuel guage readings and by changing gas to Shell or adding a few cans Techron to the tank clears the problem up. Something about gas with a high sulfur content fouls the sensor. Just a thought. Link to comment Share on other sites More sharing options...
2000 STS MN Posted October 18, 2006 Author Report Share Posted October 18, 2006 I have not purchased my FSM yet to know if I have to purchase a fuel pump and sender unit. With 126,000 miles and good chance I need to replace my Sender unit, should I replace the fuel pump while I am working this area for preventative maintence? Link to comment Share on other sites More sharing options...
Ed Hall Posted October 18, 2006 Report Share Posted October 18, 2006 Replacing the fuel pump at the same time might be a good idea because they seem to quit at the worse time and location. I just replaced mine on the side of the street after I had filled it full of gas. Mine has no access hole so I had to lower it with the tank full of fuel. Then on the other hand, my '88 Eldorado has 220k miles and is almost 20 years old. Link to comment Share on other sites More sharing options...
2000 STS MN Posted October 18, 2006 Author Report Share Posted October 18, 2006 Replacing the fuel pump at the same time might be a good idea because they seem to quit at the worse time and location. I just replaced mine on the side of the street after I had filled it full of gas. Mine has no access hole so I had to lower it with the tank full of fuel. Then on the other hand, my '88 Eldorado has 220k miles and is almost 20 years old. Thanks I am leaning to replacing both. Sometimes certain year and models have inherent issues. Any 1999-2001 STS owners with fuel pumps going out with 120k+ miles? Link to comment Share on other sites More sharing options...
franey Posted October 19, 2006 Report Share Posted October 19, 2006 Their are people that had them go out with less miles and some with more miles , does not seem to have a rhyme nor reason to when they go out, but when they do , you are just stuck, go ahead and replace both, well worth the effort and money, Last time i checked i am not sure that from the dealer that you do not have to buy both, Component replacement they call it. Link to comment Share on other sites More sharing options...
2000 STS MN Posted October 19, 2006 Author Report Share Posted October 19, 2006 Their are people that had them go out with less miles and some with more miles , does not seem to have a rhyme nor reason to when they go out, but when they do , you are just stuck, go ahead and replace both, well worth the effort and money, Last time i checked i am not sure that from the dealer that you do not have to buy both, Component replacement they call it. Thanks, a little preventative maintenance may help me when it is 20degs below and snow coming. Link to comment Share on other sites More sharing options...
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