$? quoted for repair
Thread Starter
Racer
Joined: Nov 2013
Posts: 332
Likes: 41
From: Mesa, AZ
$? quoted for repair
On going problem of fuel gauge dropping and running out of fuel even though gauge reads between 1/4-1/2 tank remaining. Fill up does correspond to the level shown on gauge. Techron concentrate used heavily. Car also does not want to start easily, cranking over a lot and then sputtering when starting to run. If I let the engine turn over twice and shut off, then when I turn back to start, the engine fires right off. Went to a highly rated shop today that works on lots of C5-C7 vettes and LS powered caddys. Tech seems to think the fuel pump in the driver's tank is bleeding down and the module located in same tank is defective. $800.00 quoted to correct. Car is an '04, six speed coupe with 21,000 on the clock. Any thoughts?
Chas
Chas
Drifting
Joined: Mar 2013
Posts: 1,496
Likes: 355
From: Little Rock Arkansas
Are you asking if the quoted price sounds correct in regards to parts replacement and labor on the driver's side fuel tank? Yes, $800 to have a shop do the work specified sounds correct. A good chunk of that will be attributed to labor.
You can remove the tanks individually on jack stands in a garage; there's not much holding each one up other than the hoses, the crossover, couple straps and like four bolts. However due to the design of the tanks and their proximity to the center of the chassis it's much easier to have access to a lift.
You can remove the tanks individually on jack stands in a garage; there's not much holding each one up other than the hoses, the crossover, couple straps and like four bolts. However due to the design of the tanks and their proximity to the center of the chassis it's much easier to have access to a lift.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Please pull and post the codes. Include the H or C or HC that follow each 5 character code. If you have never pulled codes before here is how:
https://www.youtube.com/watch?v=SviRjIsy9G4
OR
http://www.c5forum.com/ayc/dtcdic.php
Post ALL the codes and list them under the sensor that they show under. ie 10 - PCM or 28 - TCS or 40 - BCM......etc.....
First thought is that you can test if the pump is bleeding down easily with a fuel pressure gauge. I would do that before going any further. Not certain why the tech did not do that.
Connect the pressure gauge to the port on the fuel rails, turn on the key and the pressure should build to about 58lb. Turn the key off and observe the pressure on the gauge. Pressure should hold at about 58lbs for at least 10 or 15 minutes or longer. If pressure drops down rapidly the check valve in the tank has failed.
Second when the car runs out of fuel how much fuel does it take to FILL the tanks??? 5 gals?? 10 gals?? 15 gals??? Please post that info.
Third the $800 price to replace the pump on an 04 seems a bit low to me since the tanks need to be dropped in the late year 03 and all year 04 to access the pump.
Fourth depending upon how much fuel it is taking to fill the tanks when you run out of fuel, part of the problem may involve a failed jet siphon pump in the passenger tank. The jet siphon pump transfers fuel from the passenger tank to the drivers side where the electric pump that feeds the engine is located. If the jet siphon pump fails you are only using the fuel in the drivers side tank which is about 9 gals or so. Fuel in the passenger side tank just stays there..........
https://www.youtube.com/watch?v=SviRjIsy9G4
OR
http://www.c5forum.com/ayc/dtcdic.php
Post ALL the codes and list them under the sensor that they show under. ie 10 - PCM or 28 - TCS or 40 - BCM......etc.....
First thought is that you can test if the pump is bleeding down easily with a fuel pressure gauge. I would do that before going any further. Not certain why the tech did not do that.
Connect the pressure gauge to the port on the fuel rails, turn on the key and the pressure should build to about 58lb. Turn the key off and observe the pressure on the gauge. Pressure should hold at about 58lbs for at least 10 or 15 minutes or longer. If pressure drops down rapidly the check valve in the tank has failed.Second when the car runs out of fuel how much fuel does it take to FILL the tanks??? 5 gals?? 10 gals?? 15 gals??? Please post that info.
Third the $800 price to replace the pump on an 04 seems a bit low to me since the tanks need to be dropped in the late year 03 and all year 04 to access the pump.
Fourth depending upon how much fuel it is taking to fill the tanks when you run out of fuel, part of the problem may involve a failed jet siphon pump in the passenger tank. The jet siphon pump transfers fuel from the passenger tank to the drivers side where the electric pump that feeds the engine is located. If the jet siphon pump fails you are only using the fuel in the drivers side tank which is about 9 gals or so. Fuel in the passenger side tank just stays there..........
You cant get much better info and recommendations that what 8VETTE7 provided. Something else to consider. There is a small check valve located in one of the supply lines near the tank that keeps the line pressurized and full. It is no longer dealer supported if its bad..
The late model tanks also had a recall for splitting tank seams. The recall has since expired. If your tanks fall into that series tank/s, I strongly recommend replacing them with the newer replacement tanks. The recall deals with a specific Vin Series.
Bill
