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Thread: Gas Gauge....WTF?
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09-14-2010, 06:49 PM #1
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silver- 2000 formula
Gas Gauge....WTF?
my gas gauge has always read higher than what was in it.......when it said empty i usaully had 2-3 gal left........now it has totally turned around......fill up now shows 7/8 full.....and the gas light comes on when i have 4 gal left......would a new sending unit cure this? or is there some procedure to clean the contacts on the sending unit????
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09-14-2010, 07:05 PM #2
Chevron Techron claims to clean the fuel gauge sending unit.
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09-15-2010, 01:15 PM #3
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Gas light? You mean check gauges light? Sending unit is inside the tank and I wouldn't change it for a gal difference. Usually when they fail the gauge stays on full and doesn't drop. Be kind to your fuel pump and fill it before the check gauges light illuminates.
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09-15-2010, 01:44 PM #4
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silver- 2000 formula
i meant...... the check gauges light........as it seems it only comes on when the gauge is low........but why has it gone wonky all of a sudden????
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09-15-2010, 03:50 PM #5
I have to tap on my cluster once in awhile..then gas gauge moves up about a 1/4..or it starts moving up & down...then tap..WTF!!
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09-15-2010, 04:12 PM #6
start off by running some fuel system cleaner through the car. If you've ever seen how that sender works you'll understand how easy it is for that thing to get cruded up. The other thing that might be happening is your vent purge solenoid is sticking and not letting you actually fill the tank all the way up.
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09-15-2010, 08:10 PM #7
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silver- 2000 formula
where is the vent purge noid?
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09-16-2010, 03:43 AM #8
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09-16-2010, 05:19 AM #9
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09-16-2010, 05:32 AM #10
For some reason the senders accumulate sulfer deposits from the fuel and they start to act up. As stated, the Chevron Techron fuel system cleaner is advertised to remedy this issue. Add the cleaner to an almost empty tank and then fill it with 12 gallons of fuel. Run it until almost empty again and repeat the process one more time if you do not get results from the first batch.
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09-16-2010, 07:05 AM #11
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Custom Swirly Black- 2001 WS6 M6
Don't pump gas at Uncle Bob's Fillin' Station, lol.
I have had good luck with STP products in the past, so if you want to save a few bucks you could try a variation of products. They all recommend that you use them every oil change/3000 miles.
I wouldn't bother with the Lucas Oil Fuel Injector Cleaner, seemed to make things worse on a previous vehicle I had.
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09-16-2010, 03:51 PM #12
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
yep the purge solenoid under the hood. The vent solenoid is on top of the tank near the canister, I believe. The vent solenoid would be the one that could cause the gas to not fill up all the way...easily. The gas pump will keep clicking off if the gas tank isn't venting the air out.
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09-16-2010, 04:13 PM #13
4 the f-body 3800-II the purge noid is on the drivers side of the UI behind and above the thermostat.. Just thought I'd add..
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09-16-2010, 04:30 PM #14
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Quick Silver- 2002 Z06
LOL..
I had some strange issues like that after a long road trip which forced me to fill up at some less than up to date gas stations.
A few tanks full of our local Quik Trip guaranteed gas fixed me right up.
I think Shell has some detergents or whatever in their gas also.
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09-16-2010, 04:34 PM #15
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09-16-2010, 06:05 PM #16
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BLACK- 2000 Camaro SS
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09-16-2010, 06:06 PM #17
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09-16-2010, 06:55 PM #18
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silver- 2000 formula
put in a bottle of techron.......no change so far.......
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09-17-2010, 08:17 PM #19
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silver- 2000 formula
still nothing...........
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09-19-2010, 07:50 AM #20
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
might be time to drop the tank and replace the fuel level sender
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