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Old Nov 16, 2006 | 02:43 AM
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Default gas guage problem

for the last couple of times i have driven my car the gas guage will go to empty when there is about a half a tank. After restarting it everything will seem fine and the gas guage will go back to where it suppose to be the then after about maybe 20-30min of driving i will look down and it shows its completely empty and when i look at the range it gives no read out. Does anyone of the problem and how to fix it?
thanks
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Old Nov 16, 2006 | 05:40 AM
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Sometimes gas that has a high sulfur content in it will cause the sending units to go wacky. Try running a bottle or two of Techron through the tank and see if that helps. Might try switching brands of gas too. If that doesn't work, it could actually be the sending units are going bad and may need replacement.
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Old Nov 16, 2006 | 05:47 AM
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I started having a somewhat similar problem myself. The last couple of times I went to start the car, the gauge would read "empty" for about 2-3 minutes, then go up to where it should be. This is the first that I've ever experienced this, in the 5 years I've had the car.

I've been putting in a bottle of Techron every year, as none of the "top tier" brands of gas are sold in my area. Hopefully, the BIG bottle of Techron I just dumped in will fix this.
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Old Nov 16, 2006 | 06:07 AM
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Default Techron Will Fix It

Originally Posted by jbvette96
for the last couple of times i have driven my car the gas guage will go to empty when there is about a half a tank. After restarting it everything will seem fine and the gas guage will go back to where it suppose to be the then after about maybe 20-30min of driving i will look down and it shows its completely empty and when i look at the range it gives no read out. Does anyone of the problem and how to fix it?
thanks
Yes...start putting a bottle of Techron (by Chevron) in every other fill-up...put the "20 gal. size" initially, in an almost empty tank to start...then use the 12 gal. size on subsequent alternate fill-ups at 1/4 tank levels & you should never have this problem again....
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Old Nov 16, 2006 | 10:32 AM
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If you still are under warranty, you might want to check out a sender replacement. I tried Techron on-and-off for a year and finally told my dealership that I wanted the problem fixed. They replaced the units at no cost to me and the problem never returned. Thank heaven for GMPP.
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Old Nov 16, 2006 | 11:46 AM
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I had the same problem until I used Techron. Now I use Techron every 3K miles and no more gas gauge problems.
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Old Nov 16, 2006 | 11:51 AM
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thanks for all the tips guys! I am going to go put Techron in today. I hoping its not the sender because the gas i put in my car is 91 octane from chevron which has the techron in it. BUt i'll keep my fingers crossed and let you know of the results. thanks again
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Old Nov 16, 2006 | 11:58 AM
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the infamous fuel-sending unit problem. Been happening since 1999 I believe. I think its happening even on the C6's if I recall reading a C6 post on it awhile back
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Old Nov 16, 2006 | 11:59 AM
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Originally Posted by jbvette96
thanks for all the tips guys! I am going to go put Techron in today. I hoping its not the sender because the gas i put in my car is 91 octane from chevron which has the techron in it. BUt i'll keep my fingers crossed and let you know of the results. thanks again
Is that the new max for CA? 91 octane?
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Old Nov 16, 2006 | 12:05 PM
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My 98 is having the problem. Will try the Techron.
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Old Nov 16, 2006 | 01:18 PM
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Had the problem months ago, put in the "old techron", never had the problem sense. I just put in a bottle every oil change to keep her clean.
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Old Nov 16, 2006 | 01:25 PM
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I am very fimiliar with this problem and was about to get the fuel sending unit replaced and was told about SEA FOAM. I made sure that I was running a TOP TIER fuel and put a can of SEA FOAM in the tank. I ran this out and followed with another can and fuel tank and it is going on a year and now issues. Two cans of SEA FOAM...$13.00 was a lot better than replacing a fuel sending unit.

It is important to use TOP TIER gasoline, burns cleaner and is a fuel that doesn't seem to effect the sending unit like the other fuels out there.

Good luck,

Micah
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Old Nov 16, 2006 | 02:17 PM
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Originally Posted by mph1972
I am very fimiliar with this problem and was about to get the fuel sending unit replaced and was told about SEA FOAM. I made sure that I was running a TOP TIER fuel and put a can of SEA FOAM in the tank. I ran this out and followed with another can and fuel tank and it is going on a year and now issues. Two cans of SEA FOAM...$13.00 was a lot better than replacing a fuel sending unit.

It is important to use TOP TIER gasoline, burns cleaner and is a fuel that doesn't seem to effect the sending unit like the other fuels out there.

Good luck,

Micah
Techron made my problem worse, SEA FOAM did the trick. Have had ZERO fluctuations
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Old Nov 16, 2006 | 02:22 PM
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They all have this problem or will get this problem. Even changing out the sending units wont fix it permanently. If you get gas at a Chevron station, their gas already has Techron in it. Thats what Ive been doing ever since I had the problem.
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Old Nov 16, 2006 | 05:46 PM
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Originally Posted by MARK's_C5TT
Is that the new max for CA? 91 octane?
Its not the new max, 91 is the highest octane at the pump ever since i could remember. sucks too because we pay more per gallon then the rest of the country for lesser octane
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Old Nov 16, 2006 | 06:11 PM
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Originally Posted by 02MillenniumVette
They all have this problem or will get this problem. Even changing out the sending units wont fix it permanently. If you get gas at a Chevron station, their gas already has Techron in it. Thats what Ive been doing ever since I had the problem.


SHELL is good too!
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Old Nov 16, 2006 | 08:33 PM
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Who carries SEA Foam?
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To gas guage problem

Old Nov 16, 2006 | 09:18 PM
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I have tried all the above, I think I may need to replace the sending units. I had them replaced on warrenty once, fixed the problem for about a year then returned.
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Old Nov 16, 2006 | 10:39 PM
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Originally Posted by hrcantrell
Who carries SEA Foam?
Any auto parts store, AUTOZONE, ADVANCE AUTO, PEP Boys, etc.
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Old Nov 17, 2006 | 09:53 AM
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I almost always use Mobil gas out of convenience. The one time I used Chevron, I got bad fuel readings.
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