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Discussion Topic:
Gas Gauge Creeps over the full mark -49 Mercury
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Tracker |
11-18-2009 @ 11:03 AM
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New Member
Posts: 157
Joined: Oct 2009
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This 49 Merc is the proverbial little ole ladies car driven only on Sundays...it has 17,000 miles on the odometer and is still 6 volt. Superreal ... I tried your remedy..the needle falls back to zero when key is turned off. I have the sender unit out and now I see that its been replaced at sometime or another so I don't know what I'm looking for. There is nothing obvious. How to test it out of the car ? Thanks for both of your replies. Tracker
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supereal |
11-18-2009 @ 9:21 AM
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Senior
Posts: 6819
Joined: Oct 2009
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Check to see if the body of the sender is properly grounded, and that the wire to the dash isn't grounded along its path. To check it, disconnect the wire at the sender terminal and turn on the key. If the needle still pegs, the wire is grounded. If it doesn't, the sender is at fault, and will need to be pulled from the tank to examine the float, float arm, and the slider. The 6 volt type should read 10-100 ohms, the 12 volt reads 40-180. As TomO says, if you converted to 12 volts, that is likely the source of the problem.
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TomO |
11-18-2009 @ 8:11 AM
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Senior
Posts: 7238
Joined: Oct 2009
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If your car has been converted to 12 volts, that is probably normal.
Tom
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Tracker |
11-17-2009 @ 6:17 PM
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New Member
Posts: 157
Joined: Oct 2009
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The gas gauge on this like new 49 Mercury Sedan had been working perfectly when we were only putting 5/6 gals of fuel in. We filled it to near capacity with new fuel and the gas gauge has started acting up. When the key is turned off, the gas needle returns to empty. When it is turned on, the needle starts to the top but when it reaches the top fill mark, it keeps on creeping past the mark until it goes to the full peg ...about a quarter past the full mark. Has anyone dealt with this problem before ? Any suggestions would be much appreciated. Thanks .
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