When Techron isn't the fix...
Thread Starter
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
When Techron isn't the fix...
A few weeks ago my fuel gauge dropped to empty while driving and I knew I had just under half a tank while driving. So I stopped, got some fuel injector cleaner(no Techron available at the Chevron I stopped at) and took off. A few minutes of driving and the gauge went back to where it was. Now just last week I took advantage of the O'Reilly's deal and grabbed two bottles of Techron and waited until I needed fuel again. Put both bottles in there and filled up with more Chevron gas and a few days ago (On the same tank) my gauge drops down to empty again WTF? I am 90% positive it can't be the fuel sender as I am ONLY using Chevron fuel and I have used fuel injector cleaner plus two bottles of Chevron on the last fill up. All this in less than two months time. Any ideas?
-Alex
-Alex
Thread Starter
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
-Alex
Burning Brakes
Joined: Oct 2001
Posts: 1,011
Likes: 0
From: white hall ar
fwiw
mine started the same crap 4 weeks ago ...never a problem before ....ive added seafoam to it since ,,,still wont work.and 90 percent of the time use shell gas cause its right beside my house ....so im waiting to see if it starts working again or not ...good luck 
Drifting
Joined: Mar 2006
Posts: 1,340
Likes: 2
From: ZHills Florida
St. Jude Donor '08
Two years ago on a trip mine started going and being on the road it was hard to find Techron. I was putting any fuel cleaner in that I could find and it seemed to make it worse. Once I got some Techron I just kept putting it in every tank and eventually it came back.
It still goes out now and then but one bottle of Techron and boom! It's fixed.
Be patient and keep adding one battle every tankful until it's fixed. The for another couple tanks and you should be fine.
It still goes out now and then but one bottle of Techron and boom! It's fixed.
Be patient and keep adding one battle every tankful until it's fixed. The for another couple tanks and you should be fine.
Burning Brakes
Joined: Jan 2008
Posts: 986
Likes: 4
From: Galaxy Traveler
I don't know about the rest of you but when mine started doing this a couple of weeks back it would not come back until I cleared the code. The very second I cleared the code the gauge came back on. I had to reset it a few times during the week while I waited for the fuel cleaner to work.
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Thread Starter
Race Director
Joined: Jul 2007
Posts: 11,467
Likes: 8
From: 972 and 405
. Have you gotten a quote for the service on this?
-Alex
Burning Brakes
Joined: Aug 2006
Posts: 753
Likes: 2
From: Denville NJ
You may want to do a search on this, it may be part of a greater problem that could leave you stranded- running out of gas while there is still much more left in the tank!
I am a little nervous about this since just starting to have an eratic fuel gauge for the first time. Apparently there is a pin-hole venturi in the passenger side tank that )of course) clogs easily and causes problems. In some cases it needs to come out and be physically cleaned. Not sure about the '04s which have a new style tank arrangement. Can the pump and flow units be removed from the top without dropping the tanks out the bottom?? (big question)
I am a little nervous about this since just starting to have an eratic fuel gauge for the first time. Apparently there is a pin-hole venturi in the passenger side tank that )of course) clogs easily and causes problems. In some cases it needs to come out and be physically cleaned. Not sure about the '04s which have a new style tank arrangement. Can the pump and flow units be removed from the top without dropping the tanks out the bottom?? (big question)
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
You may want to do a search on this, it may be part of a greater problem that could leave you stranded- running out of gas while there is still much more left in the tank!
I am a little nervous about this since just starting to have an eratic fuel gauge for the first time. Apparently there is a pin-hole venturi in the passenger side tank that )of course) clogs easily and causes problems. In some cases it needs to come out and be physically cleaned. Not sure about the '04s which have a new style tank arrangement. Can the pump and flow units be removed from the top without dropping the tanks out the bottom?? (big question)
I am a little nervous about this since just starting to have an eratic fuel gauge for the first time. Apparently there is a pin-hole venturi in the passenger side tank that )of course) clogs easily and causes problems. In some cases it needs to come out and be physically cleaned. Not sure about the '04s which have a new style tank arrangement. Can the pump and flow units be removed from the top without dropping the tanks out the bottom?? (big question)
RH module: 89047746 (for '97 to mid '03) GM indicates this one has improved sender card.
Buy from Fichtner Chev or GMpartshouse for forum pricing. Comes complete with new gasket and screws.
Melting Slicks
Joined: Apr 2000
Posts: 2,408
Likes: 3
From: Bel Air Md
her's another interesting tid bit http://www.hessh.de/Corvette/FuelTankSystem.pdf
Last edited by HG; May 17, 2011 at 04:09 PM.
Melting Slicks
Joined: Aug 2000
Posts: 2,618
Likes: 5
From: Overland Park KS
I just spend the 10 seconds to clear the codes so my gauge starts working again. Seems easy enough....
I used to add Techron until about 3 years ago and shell v-power seems to have eliminated the gauge issues for me... gas is expensive enough WITHOUT adding techron..
I used to add Techron until about 3 years ago and shell v-power seems to have eliminated the gauge issues for me... gas is expensive enough WITHOUT adding techron..
Le Mans Master
Joined: Sep 2010
Posts: 5,520
Likes: 5
From: Long Island NY
I would try at least four treatments of 20oz bottles of Techron, more than likely this should solve the problem as most of the time it is sulfer contamination on the sending unit. I had the same problem about four years ago and unfortunately I was in the minority as it wasn't the sending unit but a bad jet pump in the tank. The tank (I'm not sure which one) had to be dropped which the rear end also had to come down to get to it. All said and done it was a $1600.00 job if I remember correctly, and it has been fine since. I've never added Techron before that and not quite sure if it would have prevented my problem. Since then I add a 20oz bottle every 3K as preventative maintanance and so far so good. I hope the Techron solves your problem, let us know how it works out for you. Good luck bro!