| | Fuel/Gas Gauge Problems & Questions |  |
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BoattailBob
Fanatic
Age : 58
Location : Bay Area, California
Joined : 2007-06-05
Post Count : 268
Merit : 0
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Thu Jun 21, 2007 12:03 am | |
| I'm having the same problem with my '97. Did you diagnose the problem with this? I assumed it was the sending unit. | |
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urbsnspices
Fanatic
Location : CHICAGO, US of MFn America
Joined : 2007-02-08
Post Count : 336
Merit : 4
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Thu Jun 21, 2007 8:49 am | |
| BTW, if you pull the fuel canister you will prolly need a new one of these:
http://198.208.187.182/internet/PartImage.jsp?mfgname=ACDELCO&prodlinecd=43&acpartnbr=TR7
Mine was rusted away.
Also, the level sensor part number is: http://198.208.187.182/internet/PartImage.jsp?mfgname=ACDELCO&prodlinecd=43&acpartnbr=TR7
They are 100+ from part stores. But check ebay for a better deal. GM uses the same set up on many cars. The only difference is the float which I think is just snapped on. | |
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96RivSCMI
Enthusiast
Name : Kenon
Age : 39
Location : Wright City, MO
Joined : 2007-01-23
Post Count : 123
Merit : 2
| | Subject: Gas gauge question Wed Jun 18, 2008 11:20 pm | |
| Alright so I've noticed that my gas gauge slowly creeps down to 1/2 tank and then drops like a rock. What causes this?
From what I understand there is a float on the fuel pump that sits in the tank and registers on a variable resistor which then feeds the instrument panel cluster. Am I way off? For some reason I've just been thinking about this for the past few days.
What would need to be done to increase the accuracy of it? | |
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captshiner
Junkie
Name : Andrew
Age : 38
Location : Cincinnati, OH
Joined : 2008-07-23
Post Count : 756
Merit : -1
| | Subject: Fuel Gage reads empty all the time. Wed Jul 23, 2008 5:46 pm | |
| My '97 S/C Riv's fuel gage just started doing this and I don't want to tear up the trunk unless I have to. No matter how much gas I put in the tank, the gage always reads on 'E' with the light on. It jumps up from the resting position when started but won't go above the 'E'. Anyone have any ideas? I thought it was the sending unit but the problems described on that thread all seemed like erratic activity. Mine stays put. Any advice or ideas will be appreciated. | |
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deekster_caddy
Master
Name : Derek
Age : 52
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Wed Jul 23, 2008 9:49 pm | |
| Sounds like a broken wire. Some wiring diagnostic will be required. Best starting point is to probe into the sending wire near the tank and see what the resistance to ground is, and what the gauge does if you ground the wire. | |
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captshiner
Junkie
Name : Andrew
Age : 38
Location : Cincinnati, OH
Joined : 2008-07-23
Post Count : 756
Merit : -1
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Wed Jul 23, 2008 11:58 pm | |
| Thanks I'll see what I can do. | |
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captshiner
Junkie
Name : Andrew
Age : 38
Location : Cincinnati, OH
Joined : 2008-07-23
Post Count : 756
Merit : -1
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Sat Jul 26, 2008 2:33 pm | |
| Ok, I filled my tank last night with a 93 octane and the gage moved! It says full and seems to be acting normally (it wasn't on empty within the 3 miles it took to get home.) I've dealt with problems like this with my musical equipment before and it's always a wire. | |
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BillBoost37
Junkie
Location : Enfield CT
Joined : 2007-11-28
Post Count : 769
Merit : 26
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Mon Jul 28, 2008 10:38 am | |
| Most likely it's the wiper on the sender that reads the resistance. One way to check if it's the gauge or the sender is to find the correct wires on the connector at the tank and substitute resistors in for the values of empty, half and full. If all those work properly on the gauge, then the issue is typically the sender. | |
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steve1173
Amateur
Name : stephen rabinowitz
Location : punta gorda, fl
Joined : 2008-05-25
Post Count : 40
Merit : 0
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Mon Jul 28, 2008 9:31 pm | |
| Try some techron plus. It cleans the sulpher from the contacts of the sending unit. | |
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'96reese
Fanatic
Name : Reese
Age : 42
Location : StL
Joined : 2007-09-20
Post Count : 259
Merit : 4
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 1:17 am | |
| sounds like you will have to replace that fuel pump pretty some. | |
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'96reese
Fanatic
Name : Reese
Age : 42
Location : StL
Joined : 2007-09-20
Post Count : 259
Merit : 4
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 1:18 am | |
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captshiner
Junkie
Name : Andrew
Age : 38
Location : Cincinnati, OH
Joined : 2008-07-23
Post Count : 756
Merit : -1
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 2:43 am | |
| If I'm in there I might as well. | |
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BillBoost37
Junkie
Location : Enfield CT
Joined : 2007-11-28
Post Count : 769
Merit : 26
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 8:04 am | |
| I have heard good things about Techron and would give it a try frist. | |
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captshiner
Junkie
Name : Andrew
Age : 38
Location : Cincinnati, OH
Joined : 2008-07-23
Post Count : 756
Merit : -1
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 12:52 pm | |
| What is this Techron stuff and how much does it cost? | |
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AA
Administrator
Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
Merit : 252
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 1:08 pm | |
|  Available at most auto parts counters. _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^  '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
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deekster_caddy
Master
Name : Derek
Age : 52
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 1:18 pm | |
| I use it. Others will rave about how well it works. I don't know how well it works except that I don't have any fuel related problems... I put in a big (20gal) bottle every 6 months or so. | |
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AA
Administrator
Name : Aaron
Age : 47
Location : C-bus, Ohio
Joined : 2007-01-13
Post Count : 18452
Merit : 252
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 1:19 pm | |
| Wow, that's a big bottle! I use the 12 oz bottle!  _________________ '05 GTO 6.0L • 6-spd • 95k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26'95 Celica GT 2.2L • 5-spd • 165k miles • 0-60: yes'98 SC Riviera • 281k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180º t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch^^^ SOLD ^^^ '70 Ninety-Eight Holiday Coupe 455cid • 116k miles^^^ SOLD ^^^ | |
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deekster_caddy
Master
Name : Derek
Age : 52
Location : Reading, MA
Joined : 2007-01-31
Post Count : 7717
Merit : 109
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 1:20 pm | |
| There is a 20 oz bottle to treat 20 gallons... Okay okay oz gal whatever... but we do have an 18 gallon tank so use the big bottle. | |
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manofmany
Addict
Name : manofmany
Age : 40
Joined : 2008-07-26
Post Count : 611
Merit : 5
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Tue Jul 29, 2008 4:31 pm | |
| I just bought a 97 Riv and it fluctuates between 1/2 and 3/4 tank and doesn't move any if I put gas in it. | |
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captshiner
Junkie
Name : Andrew
Age : 38
Location : Cincinnati, OH
Joined : 2008-07-23
Post Count : 756
Merit : -1
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Wed Jul 30, 2008 1:42 pm | |
| I got the 20 oz. bottle and my gage seems to be working appropriately. Thanks for the help guys. You all just saved me alot of time and money, for now at least. | |
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lyonsperformance
Enthusiast
Name : Michael
Age : 40
Location : Buffalo N.Y.
Joined : 2008-08-02
Post Count : 178
Merit : 0
| | Subject: Damn Gas Gauge Sat Aug 02, 2008 9:32 pm | |
| $110 in the tank and it says half full, a blind guy could tell thats inconsistant with reality! it will then fly to full after a few days and act as normal, fall back to half and stay there until it shows the warning light. I need answers as to why its off or if i need to replace | |
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manofmany
Addict
Name : manofmany
Age : 40
Joined : 2008-07-26
Post Count : 611
Merit : 5
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Sat Aug 02, 2008 9:46 pm | |
| Mine works from full-to-half then starts fluctuating. Sounds like everybody encounters the same exact probs | |
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BillBoost37
Junkie
Location : Enfield CT
Joined : 2007-11-28
Post Count : 769
Merit : 26
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Mon Aug 04, 2008 9:34 am | |
| Cheer up.. you have a secret hatch in your trunk and can pull the sender easily.
Bonnies have no hatch. However I'd suggest what others have mentioned..try a bottle of techtron cleaner. You might have varnish on your sender. | |
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manofmany
Addict
Name : manofmany
Age : 40
Joined : 2008-07-26
Post Count : 611
Merit : 5
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Mon Aug 04, 2008 10:41 am | |
| Is there a difference in the 97 and 98-99 sending units?
http://cgi.ebay.com/ebaymotors/GM-FUEL-LEVEL-SENSOR-SENDING-UNIT-BUICK-RIVIERA-98-99_W0QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247QQcategoryZ33555QQihZ011QQitemZ320205950264QQrdZ1QQsspagenameZWD1V
If they are that cheap then I wouldnt mind trying a cheap replacement | |
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lyonsperformance
Enthusiast
Name : Michael
Age : 40
Location : Buffalo N.Y.
Joined : 2008-08-02
Post Count : 178
Merit : 0
| | Subject: Re: Fuel/Gas Gauge Problems & Questions Mon Aug 04, 2008 12:08 pm | |
| Secret hatch, im all over that, where in the trunk is it located, im at work now and 10 blocks from the rivi? | |
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