Fuel cut out
Thread Starter
Heel & Toe
Joined: Mar 2020
Posts: 16
Likes: 1
From: New York
Fuel cut out
Afternoon,
I seem to have a sporadic issue that i cannot pin point what is causing it.
Currently i know i have a bad sending unit, anytime I'm below 1/2 tank there's a really good chance the fuel gauge will shut off and the dash will start warning me about low fuel and to check the display, etc.
Now that isn't my sporadic issue, what is also happening is when my car is below 1/2 tank there's an even smaller chance (happened only 2 times in 2 years) where the car will start sputtering and cutting out until it eventually shuts off and will not re-start.
Now this is fixed by putting in a bit of fuel and it'll fire right up but the car never ran dry to begin with, i can still confirm there was 1/2 tank of fuel when i go to fill it all the way up and it only takes 5gallons or so to be full.
So I'm stumped as to why mimics running out of fuel when it has 6 gallons or so in it, also stumped as to why its so rare that it happens.
It's not fun driving and you see you've hit a half tank and now are unsure if your car will randomly shut off...
Any suggestions will be appreciated in diagnosing this.
Thank you,
2008 Base Auto, Stock aside mufflers.
I seem to have a sporadic issue that i cannot pin point what is causing it.
Currently i know i have a bad sending unit, anytime I'm below 1/2 tank there's a really good chance the fuel gauge will shut off and the dash will start warning me about low fuel and to check the display, etc.
Now that isn't my sporadic issue, what is also happening is when my car is below 1/2 tank there's an even smaller chance (happened only 2 times in 2 years) where the car will start sputtering and cutting out until it eventually shuts off and will not re-start.
Now this is fixed by putting in a bit of fuel and it'll fire right up but the car never ran dry to begin with, i can still confirm there was 1/2 tank of fuel when i go to fill it all the way up and it only takes 5gallons or so to be full.
So I'm stumped as to why mimics running out of fuel when it has 6 gallons or so in it, also stumped as to why its so rare that it happens.
It's not fun driving and you see you've hit a half tank and now are unsure if your car will randomly shut off...
Any suggestions will be appreciated in diagnosing this.
Thank you,
2008 Base Auto, Stock aside mufflers.
Melting Slicks
Joined: Aug 2004
Posts: 2,907
Likes: 229
From: Oakbank Manitoba
Unfortunately the only way to get the true reliability back is to drop the tanks and replace everything inside both tanks. Your car is 15 yrs old now. Racetronix is a supporting vendor on this site and can supply most of it cheaper than the Chevrolet dealership. If you are planning to keep the car for many years than I would highly recommend this approach.
You could also purchase the internal parts from low mileage wrecked cars. There is a good thread on this site on what is involved in changing everything out yourself.
https://www.corvetteforum.com/forums...mp+replacement
You could also purchase the internal parts from low mileage wrecked cars. There is a good thread on this site on what is involved in changing everything out yourself.
https://www.corvetteforum.com/forums...mp+replacement
Last edited by KENS80V; Apr 4, 2023 at 09:07 AM.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 808
From: West coast CA
Afternoon,
I seem to have a sporadic issue that i cannot pin point what is causing it.
Currently i know i have a bad sending unit, anytime I'm below 1/2 tank there's a really good chance the fuel gauge will shut off and the dash will start warning me about low fuel and to check the display, etc.
Now that isn't my sporadic issue, what is also happening is when my car is below 1/2 tank there's an even smaller chance (happened only 2 times in 2 years) where the car will start sputtering and cutting out until it eventually shuts off and will not re-start.
Now this is fixed by putting in a bit of fuel and it'll fire right up but the car never ran dry to begin with, i can still confirm there was 1/2 tank of fuel when i go to fill it all the way up and it only takes 5gallons or so to be full.
So I'm stumped as to why mimics running out of fuel when it has 6 gallons or so in it, also stumped as to why its so rare that it happens.
It's not fun driving and you see you've hit a half tank and now are unsure if your car will randomly shut off...
Any suggestions will be appreciated in diagnosing this.
I seem to have a sporadic issue that i cannot pin point what is causing it.
Currently i know i have a bad sending unit, anytime I'm below 1/2 tank there's a really good chance the fuel gauge will shut off and the dash will start warning me about low fuel and to check the display, etc.
Now that isn't my sporadic issue, what is also happening is when my car is below 1/2 tank there's an even smaller chance (happened only 2 times in 2 years) where the car will start sputtering and cutting out until it eventually shuts off and will not re-start.
Now this is fixed by putting in a bit of fuel and it'll fire right up but the car never ran dry to begin with, i can still confirm there was 1/2 tank of fuel when i go to fill it all the way up and it only takes 5gallons or so to be full.
So I'm stumped as to why mimics running out of fuel when it has 6 gallons or so in it, also stumped as to why its so rare that it happens.
It's not fun driving and you see you've hit a half tank and now are unsure if your car will randomly shut off...
Any suggestions will be appreciated in diagnosing this.
There's something wrong with your car's inter-tank plumbing - probably an internal leak - which is preventing net fuel transfer to the left tank. Eventually the tank runs dry and the car quits. The right tank is still full, which is why it doesn't take much gas to fill up the car.
The SERVICE FUEL SYSTEM messages are likely caused by the car detecting this problem.
Next step is to pull the DTCs to confirm.
Thread Starter
Heel & Toe
Joined: Mar 2020
Posts: 16
Likes: 1
From: New York
Unfortunately the only way to get the true reliability back is to drop the tanks and replace everything inside both tanks. Your car is 15 yrs old now. Racetronix is a supporting vendor on this site and can supply most of it cheaper than the Chevrolet dealership. If you are planning to keep the car for many years than I would highly recommend this approach.
You could also purchase the internal parts from low mileage wrecked cars. There is a good thread on this site on what is involved in changing everything out yourself.
https://www.corvetteforum.com/forums...mp+replacement
You could also purchase the internal parts from low mileage wrecked cars. There is a good thread on this site on what is involved in changing everything out yourself.
https://www.corvetteforum.com/forums...mp+replacement
I think your fuel gauge problem and your car quitting are directly related. I don't think it's your level sender.
There's something wrong with your car's inter-tank plumbing - probably an internal leak - which is preventing net fuel transfer to the left tank. Eventually the tank runs dry and the car quits. The right tank is still full, which is why it doesn't take much gas to fill up the car.
The SERVICE FUEL SYSTEM messages are likely caused by the car detecting this problem.
Next step is to pull the DTCs to confirm.
There's something wrong with your car's inter-tank plumbing - probably an internal leak - which is preventing net fuel transfer to the left tank. Eventually the tank runs dry and the car quits. The right tank is still full, which is why it doesn't take much gas to fill up the car.
The SERVICE FUEL SYSTEM messages are likely caused by the car detecting this problem.
Next step is to pull the DTCs to confirm.
Thank you both for taking the time to help me out on this.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 808
From: West coast CA
P2067 and P2068 are signal out-of-range codes that indicate problems with the senders or the sender wiring.
Thread Starter
Heel & Toe
Joined: Mar 2020
Posts: 16
Likes: 1
From: New York
DTCs like P2066 and P2636 are set in response to signals from the sending units, but they typically indicate problems with the transfer system and not the senders themselves.
P2067 and P2068 are signal out-of-range codes that indicate problems with the senders or the sender wiring.
P2067 and P2068 are signal out-of-range codes that indicate problems with the senders or the sender wiring.
Le Mans Master
Joined: Dec 2004
Posts: 5,492
Likes: 808
From: West coast CA
Almost everything that goes wrong will require dropping the tanks, unfortunately. But you can get a better idea of the root cause not only by getting the DTC(s) but by watching the two fuel level signals on your scan tool. If the internal plumbing is working, the right fuel level should go down first, and only then should the left level start to drop. If your left tank is empty or low and your right tank is full, you have a transfer system failure.
Thread Starter
Heel & Toe
Joined: Mar 2020
Posts: 16
Likes: 1
From: New York
P0463 suggests either a dirty sender or a poor connection.
Almost everything that goes wrong will require dropping the tanks, unfortunately. But you can get a better idea of the root cause not only by getting the DTC(s) but by watching the two fuel level signals on your scan tool. If the internal plumbing is working, the right fuel level should go down first, and only then should the left level start to drop. If your left tank is empty or low and your right tank is full, you have a transfer system failure.
Almost everything that goes wrong will require dropping the tanks, unfortunately. But you can get a better idea of the root cause not only by getting the DTC(s) but by watching the two fuel level signals on your scan tool. If the internal plumbing is working, the right fuel level should go down first, and only then should the left level start to drop. If your left tank is empty or low and your right tank is full, you have a transfer system failure.
Although I've come to terms that ill need to drop the tanks, going to collect the parts i need prior and set out to do it on a nice weekend.
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Melting Slicks
Joined: Jul 2006
Posts: 2,291
Likes: 492
From: Salmon Arm, BC
I did have a flexible hose go bad on the inside and was sending little chunks of rubber up to the carb....the filter caught all those bits. Just wondering when you last changed the filter?