How hard is it? Can it even be done? Tank is empty yet the gauge says there is still fuel. Just thought it would be a good thing to take care of while there is a good refrance point.

The best way is to adjust the float / sender in the tank. That's how mine got fixed, but it's a lot of work .

The other way is to fill / empty the tank, then take the gauge pod apart to reveal the needles on the gauges. You can use a fork or spoon and gently pry the needle off the gas gauge. Align the tip of needle with the "Full" or "Empty" mark and gently press it back onto the gauge (there will be a thin stud about the size of a sewing needle that the needle arm gets pressed onto).

[This message has been edited by PaulJK (edited 08-19-2006).]

It is alot of work fooling with the float, still messing with mine, ran accross this site, don`t know if anyone has tried their products though.
http://www.fix-a-gauge.com/index.php

If you have the tank out, the sending unit has 2 spring loaded adjusting screws that hols a wire wound resistor on a flat board in place. the contact points are thru the spring to the board. the float is the other contact and slides up the side of the board.
remove the board, and carefully clean the contact area wire, the slide contact area. reassembple and see how it looks on the guage hanging down. should be below E. if not, wiggle the board, see if the reading drops, if it does, you may have more cleaning to do. there was an article where one guy actually soldered the last few wires together on the top side, which corrected the reading. How he did that is vague tho, as resistor wire does not hold solder.
it is all contact point resistance that is the problem, if you get it cleaned and good contact made,the guage will be more accurate. that was the longest part of changing my fuel pump, playing with that part to get the reading right. I had it apart and together about 20x tweaking and playing with it. net result, it was dead on for a month, and now is at the 1/16 mark being near empty. but seems to be holding there. I suspect e is emptyh now, as at that point now, it took 10.5 gallons on an 88, so only 2 gallons left. close enough.

[This message has been edited by tjm4fun (edited 08-19-2006).]

If you have a stock 88, the tank holds a little over 11 gallons, so you maybe more empty than you think .

From reading a lot of threads on this subject, it seems like most people are filling their tanks based on mileage driven becuase the gas gauges are so inaccurate. Personally, I anxiously seek out a gas station when I get to about 200 miles on a tank....

After fooling some more with my 88Gt, Full is now reading between 3/4 tank and full, I`m guessing empty has to 1/8 to 1/4 below empty on the gauge, I`ll do the above for now, 200 on odo means time for fuel...

I followed the Fiero Sails directions and mine is very close or right on at empty, Full is over the full mark but I'm fine with that. It only stays pegged for about 1 gal. used.

I had to solder a couple wraps of the wire as the post says as the ajustment screws where not enough to get it right. .

quote Originally posted by PaulJK: If you have a stock 88, the tank holds a little over 11 gallons, so you maybe more empty than you think . From reading a lot of threads on this subject, it seems like most people are filling their tanks based on mileage driven becuase the gas gauges are so inaccurate. Personally, I anxiously seek out a gas station when I get to about 200 miles on a tank....

Actually it's 11.9 gallons for 1986 v6, and all 1987 and all 1988. so I would say 10.5 gallon fillup on E is close enough. But since I dont; trust it will hold, I shoot for 180 miles to be safe between fillups.
think it has already wandered up a tad, and I hate walking with a gas can....

Dodgerunner, did you have any luck getting the solder to stick? I cleaned it, tried electronis flux and flux core, silver solder and it;s associated cleaner, but nothing stuck, even with enough heat to burn the board a little. (I have about 5 soldering irons of increasing wattage and the killer 300w gun that butned it) I ended up using some fine wire I had to short out the last few windings.
and mine also goes pinned when full, but for just a gallon or so. I was thinking of fixing that at the guage, but I think I give up for now....

[This message has been edited by tjm4fun (edited 08-20-2006).]

I sanded the wires where I wanted to solder and was able to get it to stick.