| flatheadfan | -- 05-22-2012 @ 1:29 AM |
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I have a '36 Ford with an electrical gas tank indicator. I have had this for years without any problems and then something weird started occurring. When you turn on the ignition the gauge would read accurately and then the indicator would start dropping back to empty. If you turned off the ignition and waited 5 minutes the same thing would occur again. I pulled the dash unit and bench tested it and it read normally. I reinstalled it and hooked a separate wire from the dash unit to another sender and the dash unit read normally. Conclusion- it must be the sender that is giving me grief. Unfortunately, to get to the sender I must pull the gas tank. I have a rumble conversion in the coupe which prevents any sort of access to the sender from the top. So, everything must be handled from below. I pulled the tank removed the sender bench tested it and it work just fine. Just to be safe I replaced the sender with another that tested good. To insure a good ground I made a separate ground wire from the sender to the car frame. I put everything back together and everything read normal. Now the same problem is starting all over again. I re-checked the dash unit, strung a new wire back to the tank, Re-checked everything with another sender and everything works like it should. I am at the point of pulling the gas tank again and re-checking the tank sender but I don't think I will find anything wrong. I'm stumped! I am open for suggestions. Thanks. Tom
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