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Help! Fuel Gauge went to Zero with 1/2 tale of fuel

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Dr C5 Corvette

Guest
Hi Everyone, Comming home from the shore tonight my chime went off and said check gauges low fuel I looked at the gauge and it was on E. The heads up display also showed empty. but I know there is 1/2 of a tank of fuel or more. I shut the car off and restarted it and it still was the same. What could have happened ;shrug ? I worked on my stock air box today and opened it up with a dremal for more air put every thing back right and tight dont think that has anything to do with this. Any suggestions would be helpful .....Thanks Dr C5 Corvette
 

wishuwerehere82

Well-known member
Joined
Sep 6, 2003
Messages
2,314
Location
Rochester, NY
Corvette
Red '82 Coupe,Sebring Silver '98 Coupe
Either your sender unit is malfunctioning, or you have a loose connection to the sender. Check to see if you have any loose connectors to the tank.
The connections are in front of the rear tires at the front of the wheelwell.
You might have to take the rear tires off to get a good look at them. They are the round ports on the bottom of the fuel cells with wires and hoses going to it in both wheel wells. Just look forward and you will see them.
I thought that was a poor choice of location for water intrusion, but that's where they are. One set of wires on the drivers side goes to the fuel pump and the other is for the tank level sender.
 

bossvette

Gone but not forgotten
Joined
May 19, 2003
Messages
3,233
Location
West Unity Ohio
Corvette
1968 1997
Mine would do that from time to time until I started using Techron on a regular basis
 
Joined
May 10, 2002
Messages
2,254
Location
Boise, Idaho
Corvette
2002 electron blue Z06
This is a common problem with the C5. The fix:
1. Make sure you have the most current computer program updates (if you have an older C5)
2. Use quality fuel.
3. Add Techron to the gas periodically.
4. Replace sending unit, if necessary.

See these threads:

http://corvetteactioncenter.com/forums/showthread.php?t=42068&highlight=fuel+gauge

http://corvetteactioncenter.com/forums/showthread.php?t=12017&highlight=fuel+gauge

http://corvetteactioncenter.com/forums/showthread.php?t=28650&highlight=fuel+gauge
 
Joined
Jan 19, 2003
Messages
3,021
Location
5,800 feet above sea level
Corvette
2006 'Evil Stealth Black' Roadster
Dr. C5,
I've only had what you describe happen to me once since I acquired my Z06, but it's certainly a bewildering feeling to know you have half a tank of gas, and a range of probably 200 miles before needing to fill up again, and yet your getting warnings that you almost out of fuel. That mild panic that you might end up stranded on the side of the road, having to push the car to the nearest gas station sets in.

The good news is that DRTH is quite right in his recommended steps. Generally this is an issue of the quality of gas put in the tank. I found a couple of threads discussing the quality of gasoline and how important it is to high performance engines:

Thread 1
Thread 2

:w
-Patrick
 
D

Dr C5 Corvette

Guest
Thanks for the info I will Check that with my oil change .....Dr C5 Corvettel
 
D

Dr C5 Corvette

Guest
Thanks DRTH, I will follow your steps and let you know, Great Forum Thanks again....Dr C5 Corvette
 
D

Dr C5 Corvette

Guest
Yes I always try to use a good gas, looks like WAWA gas may have done this thats where I filled up yesterday and its a fairly new station thanks for the input...Dr C5 Corvette
 

garllo

Well-known member
Joined
Mar 22, 2007
Messages
70
Location
connecticut
Corvette
2004 Torch Red Convertible
Hi Everyone, Comming home from the shore tonight my chime went off and said check gauges low fuel I looked at the gauge and it was on E. The heads up display also showed empty. but I know there is 1/2 of a tank of fuel or more. I shut the car off and restarted it and it still was the same. What could have happened ;shrug ? I worked on my stock air box today and opened it up with a dremal for more air put every thing back right and tight dont think that has anything to do with this. Any suggestions would be helpful .....Thanks Dr C5 Corvette
The same thing happened to my 98 when it was a couple of years old. The dealer said that there was a TSB on that problem and they replaced the sending unit and several other parts all under warranty. Everyone says that techron works really well to keep those components working properly-I use it also.
 
D

Dr C5 Corvette

Guest
Ok Eveyone Checked my codes and found a code in the pcm (P1431 HC) here is the meaning:
P1431 Fuel Level Sensor 2 Circuit Performance

What does this code mean ;shrug ? I guess I need the tsb update on my computer? thanks for the fast help and in fo...Dr C5 Corvette

 

Mr. Lucky

Well-known member
Joined
Aug 30, 2004
Messages
405
Location
Orange, CA
Corvette
2004 MY stroker Coupe
Ok Eveyone Checked my codes and found a code in the pcm (P1431 HC) here is the meaning:
P1431 Fuel Level Sensor 2 Circuit Performance

What does this code mean ;shrug ?
It's the same as what DRTH VTR told you. That code just defines specifically which sensor is misbehaving (sensor 2 = right fuel tank).
 
D

Dr C5 Corvette

Guest
Thanks Mr Lucky, this is a great forum!
 

bwing

Well-known member
Joined
Oct 28, 2005
Messages
517
Location
California
Corvette
03 Z06,66 coupe(sold),99 Porsche Carrera(sold)
A service bulletin by GM said that this is a problem with the early model C5's. It's covered under warranty. Check it out with your dealer.
 

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