Major Issues with fuel transfer in the twin gas tanks
02-18-2018, 06:06 PM
#1
Instructor
Thread Starter
Major Issues with fuel transfer in the twin gas tanks
Has anybody had issues with fuel not transferring properly between the two tanks? I had to have one tank replaced due to a transfer line breaking loose from the plastic nozzle on one tank and fuel leaking. Now the 2004 car runs out of gas when the fuel gauge registers 1/2. 6-7 gallons of gas brings the gauge up to 3/4 tank. Could this be the transfer valve? The dual tanks seem like a very poorly engineered system.
02-18-2018, 10:46 PM
#2
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Waiting for 8Vette7 to chime in, give him a day or so. If not, send him a PM.
02-19-2018, 05:09 AM
#3
Burning Brakes
Here is some more info on the 2003-2004 fueltank system and how it works
Also check your fuelpressure , I think the siphron pump needs nearly 60psi to function
http://www.corvetteactioncenter.com/...ystem-389.html
Also check your fuelpressure , I think the siphron pump needs nearly 60psi to function
http://www.corvetteactioncenter.com/...ystem-389.html
Last edited by oelarse; 02-19-2018 at 05:12 AM.
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ArmchairArchitect (03-04-2018)
03-02-2018, 09:54 AM
#4
Instructor
Thread Starter
Now I am scheduled to return to my service shop to have the whole rear end of the car disassembled again to replace the transfer valve (jet syphon pump) located in the passenger gas tank. $$$$$
03-02-2018, 07:26 PM
#5
Instructor
Thread Starter
Dropping the tanks is a labor intensive job for certain and therefore the labor cost is not going to be small.
The tanks do have to be dropped to get to the jet syphon pump on your year car but the trans and diff should NOT have to be dropped to get the tanks out. Your wording of the above is suggesting that the shop is going to have to drop the trans and diff. Is that what you are implying???
If that is what they plan to do then I suggest that you find another shop. JMHO
The tanks do have to be dropped to get to the jet syphon pump on your year car but the trans and diff should NOT have to be dropped to get the tanks out. Your wording of the above is suggesting that the shop is going to have to drop the trans and diff. Is that what you are implying???
If that is what they plan to do then I suggest that you find another shop. JMHO
03-02-2018, 08:16 PM
#6
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The amount of effort depends on what year car you have. Mid 2003 through current year models have a different fuel system than early C5s which requires more tear down. The thing is you need a good mechanic doing the work as it is very easy to F up the repair when reinstalling the tank. You don't need to drop the drive train to do the work but when the passenger side fuel sender went bad in my 08 the dealer mechanic found out it was easier to drop the cradle just a little to get some room to work and to see what they were doing a little better. Getting the fuel tank plugged into the cross over without screwing up the seal when you can't see the spot where you are connecting two large tubes with two smaller tubes inside each of them. After two screwed up seals and dropping the cradle two guys working together were able to get the cross over tube connected properly without leaking. I watched them doing some of the work and was glad they were doing it and not me. It is a real PIA. If you want to see what the 2004 FSM says to do I have attached a PDF file telling how to remove and reinstall the passenger side fuel tank.
Bill
Bill
Last edited by Bill Dearborn; 03-02-2018 at 08:18 PM.
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vette3800 (03-05-2018)
03-05-2018, 09:46 AM
#7
Instructor
Thread Starter
The amount of effort depends on what year car you have. Mid 2003 through current year models have a different fuel system than early C5s which requires more tear down. The thing is you need a good mechanic doing the work as it is very easy to F up the repair when reinstalling the tank. You don't need to drop the drive train to do the work but when the passenger side fuel sender went bad in my 08 the dealer mechanic found out it was easier to drop the cradle just a little to get some room to work and to see what they were doing a little better. Getting the fuel tank plugged into the cross over without screwing up the seal when you can't see the spot where you are connecting two large tubes with two smaller tubes inside each of them. After two screwed up seals and dropping the cradle two guys working together were able to get the cross over tube connected properly without leaking. I watched them doing some of the work and was glad they were doing it and not me. It is a real PIA. If you want to see what the 2004 FSM says to do I have attached a PDF file telling how to remove and reinstall the passenger side fuel tank.
Bill
Bill