Quoting r4pt0x:
The gauge uses the delta R from the sensor to indicate the fuel level change.
... I'm a dumbass, so I'm not exactly sure what this means. /ubbthreads/images/graemlins/blush.gif
Unless I am mistaken (which does happen, a
lot /ubbthreads/images/graemlins/blush.gif ) I *believe* the actual construction of the gauge
as used in a Galant VR4 is a
"wheatstone bridge"
The variable leg in the bridge is the sender in the fuel tank.
Quoting r4pt0x:
I also forgot about that when installing the evo fuel pump to my FWD galant: I dropped the fuel tank, then unplugged the sensor but reconnected it AFTER lifting up the fuel tank - so it also showed a lower level than i actually had left.
I have swapped quite a few instrument clusters due to vss failures, and the fuel gauge
always "seems" to register just fine (as in the same level as the previous gauge) after a moment or two.
It
must be noted that the gauge is heavily dampened (reaction time slowed down) so as not too fluctuate wildy as the fuel shift in reaction to the vehicles motion.
It will take several minutes for it to equalize.
Quoting r4pt0x:
There is no reference like "X Ohms equals fuel level Y".
The factory service manual lists resistance for the float / sender at certain positions.
I have used this set of specs to dial in
many a sender.
In fact, so far,
all the problems I have found in the fuel gauge system have been in the float arm assembly (bent /damaged), the float wiper (broken wire strands in the winding), or high resistance on the ground side of the circuit.
Quoting r4pt0x:
Only accurate solution:
fill up (or empty) the tank, unplug the sensor, open up the dashboard, set the needle to full (or empty) and reconnect the sensor.
While I like your posts, (you sound like a saavy cat /ubbthreads/images/graemlins/smile.gif ), I would still suggest troubleshooting things the old fashioned way first.
It's worked for me,
every time. /ubbthreads/images/graemlins/smile.gif
