|
|
|
03-25-2015, 05:41 PM
|
#1 |
|
Registered User
Join Date: Aug 2007
Location: clifton tx
Posts: 209
|
fuel guage problem
ok folks here is what i've got 1987 c10 swb single fuel tank. fuel guage does not read right , runs out of fuel at half a tank .did this with old sending unit still does this with a new sending unit. guage oms out correct. does this with every fuel guage i use. what do i check now.
|
|
|
|
03-25-2015, 08:38 PM
|
#2 |
|
Registered User
Join Date: Feb 2015
Location: Bonham, Texas
Posts: 241
|
Re: fuel guage problem
Probably the sending unit is getting stuck.
|
|
|
|
|
03-25-2015, 10:50 PM
|
#3 |
|
Registered User
Join Date: Aug 2007
Location: clifton tx
Posts: 209
|
Re: fuel guage problem
new sending unit
|
|
|
|
|
03-25-2015, 10:56 PM
|
#4 |
|
Registered User
Join Date: Apr 2012
Location: san diego ca
Posts: 618
|
Re: fuel guage problem
Hows the ground look
|
|
|
|
|
03-26-2015, 12:07 AM
|
#5 |
|
Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,189
|
Re: fuel guage problem
Have you tried a brand new gauge or a used one? I don't know of anything involved except sending unit, ground, gauge and the wiring in between (unless dual tanks.) My gauge read the same way and a new gauge fixed the problem. If you used an aftermarket sending unit I would suspect that also.
|
|
|
|
|
03-26-2015, 08:53 AM
|
#6 |
|
Registered User
Join Date: Aug 2007
Location: clifton tx
Posts: 209
|
Re: fuel guage problem
i've got 10 plus fuel guages , does this with every one of them . did this with old fuel sender , still does this wite new fule sender . spectra brand sender.
|
|
|
|
|
03-26-2015, 08:56 AM
|
#7 |
|
Registered User
Join Date: Jan 2009
Location: Calgary, AB
Posts: 1,181
|
Re: fuel guage problem
You need to be checking your grounds.
|
|
|
|
|
03-26-2015, 10:05 AM
|
#8 |
|
Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
|
Re: fuel guage problem
The gauge has a ceramic calibration resistor on the back of the gauge coil cannister. If it's cracked or not making good contact it'll cause the gauge to malfunction the way you describe.
If the gauge itself has stared to fail that'll cause this too. The other thing that'll do this is increased resistance in the sender circuit... but that'll cause the needle to read super high, past the Full line on the face, when you fill it.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
|
|
|
 |
| Bookmarks |
|
|
Hybrid Mode
