Fuel Gauge

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TheeMc
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Fuel Gauge

Post by TheeMc »

I'm sure this has been gone over before, but I am a newbie here and don't seem to find a post that addresses this particular problem.

My fuel gauge only registers 1/2 tank, I can fill it till I see gas in the filler tube, goes up to slightly over 1/2 tank. I recently had a new sending unit put in, same thing. To add to this my dash lights are intermittent, when they go off, I lose the gas gauge all together.

Does this sound like the voltage regulator (behind the dash cluster)?
I have the printed circuit board type, is there an easy way to test the gauge / sending unit?

Any help?
Thx!
TheeMc
72 F-250 C/S
Why do we drive on a parkway, and park on a driveway?

"98% of all Dodge trucks are still on the road;
The other 2% actually made it home..."
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68F250
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re: Fuel Gauge

Post by 68F250 »

If your temperature gauge is acting normal, then I doubt it's the instrument voltage regulator.

Guessing maybe you have some flaky connections where the harness plugs into the back of the cluster.
Barry

"Are you gonna make it all 220?"
"Yeah 220, 221, whatever it takes."
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TheeMc
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re: Fuel Gauge

Post by TheeMc »

After reading another reply, I grounded the orange wire to the sending unit base and it did go to full, looks like I have either a lying mechanic, or 2 bad sending units, now, where to get a new sending unit.....
TheeMc
72 F-250 C/S
Why do we drive on a parkway, and park on a driveway?

"98% of all Dodge trucks are still on the road;
The other 2% actually made it home..."
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68F250
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re: Fuel Gauge

Post by 68F250 »

When you ground the orange wire, the gauge should go way past the full mark and peg out. If it's only going to the full mark, then there's still something wrong.
Barry

"Are you gonna make it all 220?"
"Yeah 220, 221, whatever it takes."
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TheeMc
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re: Fuel Gauge

Post by TheeMc »

I apoligize, my fault, it did indeed peg the guage :oops:
M
TheeMc
72 F-250 C/S
Why do we drive on a parkway, and park on a driveway?

"98% of all Dodge trucks are still on the road;
The other 2% actually made it home..."
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71 LONG BED
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re: Fuel Gauge

Post by 71 LONG BED »

:wel: to the site

I don't want to sound like I'm asking you to be a guinea pig, but can you let us know if a new sending unit works. Or I should say, another new sending unit. Maybe that would cure my "reading 3/4 when full" problem also. Thanks and good luck
John Member #1549
71 F100 Sport Custom__________1967 F350 Gone, but not forgotten
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TheeMc
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re: Fuel Gauge

Post by TheeMc »

I'll be happy to let y'all know, but it'll be a couple of weeks, headed out for a quick camping trip, will order sending unit when I get back....
TheeMc
72 F-250 C/S
Why do we drive on a parkway, and park on a driveway?

"98% of all Dodge trucks are still on the road;
The other 2% actually made it home..."
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71 LONG BED
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Post by 71 LONG BED »

Thanks for the resistor tip 68F250. I'm going to try it. I have a ton of resistors from when was into CB's. I just hope I can remember how to read the values. I'll be on the net I'm sure.
John Member #1549
71 F100 Sport Custom__________1967 F350 Gone, but not forgotten
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re: Fuel Gauge

Post by 71 LONG BED »

I think I found the answer to my gauge question here...

http://www.fordification.com/forum/viewtopic.php?t=9698
John Member #1549
71 F100 Sport Custom__________1967 F350 Gone, but not forgotten
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68F250
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re: Fuel Gauge

Post by 68F250 »

I'd love to have a '71 or '72 just for a day to troubleshoot and find out exactly what's going on.
Barry

"Are you gonna make it all 220?"
"Yeah 220, 221, whatever it takes."
gonzalo medina
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re: Fuel Gauge

Post by gonzalo medina »

If your ever in fresno, drop by and you could play with mine for as long as you want. Mine is a 72 and nothing will get that thing to work :lol: I would pay someone nearly anything to get it to work correctly. I'am going the after market route.
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TheeMc
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re: Fuel Gauge

Post by TheeMc »

My new sending unit arrived today and is installed, working like a champ.
I checked several vendors they were running between 60-65 bucks, Blue Oval had theirs for $49.95, and it works like new!
Thanks for the help!
M
TheeMc
72 F-250 C/S
Why do we drive on a parkway, and park on a driveway?

"98% of all Dodge trucks are still on the road;
The other 2% actually made it home..."
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