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Interesting point. To be honest, the only time I would fill the tank up full is if I'm about to start a long trip in France, like Le Mans, where gas stations aren't so plentiful on the main autoroutes. Otherwise I'm likely to only fuel up to half a tank - don't like carrying any unnecessary dead weigh more than I have to, even if it does mean more gas station visits
I didn't notice any corrosion on the wire ends of any particular type when I wiped the full length of the wire with a cotton bud. Setting the potentiometer to the full tank resistance reading (from Clark's table) did show the gauge needle to be at its' highest. Eliminating the gauge from the concern equation was a win in my case. But yes, you make a good point that possibly the higher points of the float wires will be the least 'used' and suffer some mild evaporative gas coating (or other) affecting the wire contacts.
The Clark's Article starts with disconnecting the fuel lines from the sending unit. The article doesn't mention anything about releasing fuel pressure first, but isn't the fuel under pressure? If so, what is the best way to relieve the pressure before doing this job?
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