Spectra fuel sending unit
We have all read the Values of resistance oh so many times
You can disagree all you want but the science is valid. The aftermarket senders with NON aftermarket guages are not compatable.
The shape of the tank, the curve of the guage and the curve of the sender all have to match up. If you have a rectangular 18 gallon tank with 9 gallons of gas in it the float will be 1/2 way through its travel.
BUT with our tanks with the cutout for the spare, the slope on the bottom of the tank the sender float will not be 1/2 way through its travel with 9 gallions in the tank. That is one reason why a sender that is liner reads in accuritely.
Sure the wire from the tank to the guage adds resistance, sure the IVR isnt what it used to be, and the guage is a little worse for wear, but none of that explains the fact that 3 senders in the same car with the same tank and guage and ivr and wire only 1 reads correctly and that one is the OEM unit.
