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08-24-2013, 02:34 AM
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#1 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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1987 fuel gage issue.
The PO swapped the tbi 305 with a carberated 383 (good choice). He installed a different tank and sending unit. I cannot for the life of me get the fuel gage to come off 3 o'clock. Ground is good at the sending unit. Where else should I look? I'm considering running wires direct to the gage to rule out the printed circuit on the back of the cluster. Which pin does what?
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08-24-2013, 02:38 AM
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#2 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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Re: 1987 fuel gage issue.
Just a note: the factory wire harness to the motor is gone. The wire to the sender is pink, and the ground to the sender is to the frame. All other gauges work fine. Thanks for the help.
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08-24-2013, 05:59 AM
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#3 |
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Registered User
Join Date: Jul 2011
Location: back 40, bc
Posts: 3,817
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Re: 1987 fuel gage issue.
a fuel gauge stuck at 3 is caused by a break in the sender wire (pink). this happened to my truck last year
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08-24-2013, 06:14 AM
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#4 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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Re: 1987 fuel gage issue.
Ill track it back. Thanks for the info
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08-24-2013, 06:18 AM
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#5 |
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Account Suspended
 Join Date: Mar 2013
Location: lumberton tx
Posts: 575
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Re: 1987 fuel gage issue.
Subd...my pass side tank gauge does this.
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09-23-2013, 03:02 AM
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#6 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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Re: 1987 fuel gage issue.
Tore into my tank tonight. Found the wire to the fuel sender (black conector at the top) was broke. Hooked up good, but no connection. Replaced the fuel sender and wires...... Yatzee!!!! Not just to figure out a way to keep it from sloshing when I exellerate and stop. One step closer to a perfict truck. Body will be next
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09-25-2013, 09:17 PM
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#7 | |
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Registered User
Join Date: Jun 2009
Location: san francisco, ca (east bay)
Posts: 674
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Re: 1987 fuel gage issue.
Quote:
As it back and forth from 1/2 to Full so you can never tell how much gas you have? |
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09-24-2013, 10:04 AM
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#8 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,950
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Re: 1987 fuel gage issue.
Sloshing could be the cluster ground splice in the harness. Look for posts by Motornut for pictures of what you need to find.
__________________
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. |
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09-25-2013, 10:09 PM
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#9 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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Re: 1987 fuel gage issue.
At an idle it holds still at half a tank. When I take off it goes up. When I brake it goes down. When I fill it. It reads over full. Roughly 1:30- 2:00
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09-26-2013, 09:32 AM
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#10 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 1987 fuel gage issue.
check here,about a foot from the cluster plug
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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09-26-2013, 06:49 PM
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#11 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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Re: 1987 fuel gage issue.
What's the best way to get the gage cluster out. I took out every screw I could find. The sucker wouldn't budge. Are there bolts under the dash?
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09-26-2013, 06:57 PM
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#12 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 1987 fuel gage issue.
bolts around the outside white shell
clip on the speedo and the wire plug and watch out the upper right socket may have a black fiber optic thing off it and you have to pull out from behind the metal part I've even tugged the metal out a touch to make it easer Posted via Mobile Device
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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09-26-2013, 07:41 PM
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#13 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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Re: 1987 fuel gage issue.
Ill tear into her in the mornin and let yah know. I checked every ground I could find today. Cleaned them good and torqued them back down. (Probably needed it anyway). Ill try to get that cluster out and check those splices. Thanks a million for the pics
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09-26-2013, 07:42 PM
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#14 |
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Registered User
Join Date: Feb 2013
Location: Markle indiana
Posts: 42
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Re: 1987 fuel gage issue.
I'm just checking for loose connections and dirt?
Posted via Mobile Device Last edited by V10farmboysdream; 09-26-2013 at 07:58 PM. |
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09-26-2013, 09:43 PM
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#15 | |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: 1987 fuel gage issue.
Quote:
I used some crazy glue on mine I switched from idiots to tach/gauges,repinned some of the harness plug to make it work I actually had to add another seperate ground wire to (the ebrake bus) just for the fuel gauge as it was not there before i did this swap i bounced like .....
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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