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  • 1965 - 1973 Classic Mustangs -General/Talk-
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Fuel gauge not working

  • Thread starter Thread starter Myfirst67
  • Start date Start date Aug 5, 2004

Myfirst67

New Member
Jan 26, 2004
88
0
0
richmond, California
Aug 5, 2004
#1
  • Aug 5, 2004
  • #1
how do i fix it, it just stays on E whats wrong with it
 
F

ForceFed70

That's why they call it "dope"
Founding Member
Dec 6, 1999
4,818
1
69
BC Canada
Aug 5, 2004
#2
  • Aug 5, 2004
  • #2
Could be any number of things.

Start with this:
Climb under the rear and pull the wire off of the fuel sender unit (wire to the gas tank). Now ground this wire out, then get in the car and turn on the ignition. The guage should be pegged past "F". If not, it's 1 of 3 things

1) Power to guage (should have +5V to guage)
2) Guage itself.
3) break in wire between guage and fuel sender.

If it does max out, then the problem is with the fuel sender unit itself.
 

brtnstrns

Member
Dec 19, 2003
606
11
19
Lewisville, TX
www.cardomain.com
Aug 5, 2004
#3
  • Aug 5, 2004
  • #3
replace the sending unit, did it with mine and it was fixed
 

65fastback2+2

New Member
Aug 4, 2003
1,229
0
0
Louisville, KY
www.hotdub.com
Aug 5, 2004
#4
  • Aug 5, 2004
  • #4
yours isnt the only one with this problem ahah
 

WORTH

20+ Year Stangneter
Nov 18, 2002
2,166
44
98
73
Cape Cod, Ma.
68.69.48.22
Aug 6, 2004
#5
  • Aug 6, 2004
  • #5
brtnstrns said:
replace the sending unit, did it with mine and it was fixed
Click to expand...

WOW, you must be a great mechanic, diagnostics by brainwave.
 

2nd Mustang

Founding Member
Feb 24, 2002
2,488
0
46
Southern California
Aug 6, 2004
#6
  • Aug 6, 2004
  • #6
65fastback2+2 said:
yours isnt the only one with this problem ahah
Click to expand...

Mine bounces around wildly at idle and with the key just to the on position. The only way I can get a good reading is to keep the rpms up at around 2500, so when I need to know the gas level, it's freeway time! I think it's a bad connection at the gauge.
 

JimBowy

Member
Nov 8, 2003
330
0
17
Downriver, Mi
www.projectstang.com
Aug 6, 2004
#7
  • Aug 6, 2004
  • #7
2nd Mustang said:
Mine bounces around wildly at idle and with the key just to the on position. The only way I can get a good reading is to keep the rpms up at around 2500, so when I need to know the gas level, it's freeway time! I think it's a bad connection at the gauge.
Click to expand...

Mine is always lying to me...
I'll be driving on the highway for 50 minutes with the correct fuel reading (1/4 tank or so) and all of a sudden I'm getting a *FREE* fueling! My car is special it fills the tank for me.... All the way up to "F" it goes.... It stays like that for a few days and finally drops back to where I believe "Normal" to be.... Ughhhhh
 
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