gas gauge only works when it's cool out.
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gas gauge only works when it's cool out.
I have a 1990 740 and the gas gauge acts very strange. it only works when it's below 70 degrees Fahrenheit or so outside. Above that it doesn't do anything. what is the issue? do I need a new gauge? new capacitors?
no mo volvo
Joined: Oct 2010
Posts: 11,289
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From: 37 North on the left coast
I'm inclined to suspect the sender inside the tank rather than the instrument panel gauge. the sender is a variable resistance, the gauge biases this with a voltage and measures/displays how much current.
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