Fuel gauge

Asked by Feb 06, 2016 at 09:32 PM about the 2002 Chevrolet Corvette Coupe RWD

Question type: Maintenance & Repair

Filled gas tank up drove about 10 miles and low
fuel light came on and gauge is at empty

2 Answers

5

make sure you fuel tank cap is shut tight, if not you will get false reading,

165

)  I THINK the problem is that the way the system is set up, the car drains the passenger side tank first.  So the passenger side electrical fuel level sensor is constantly being exercised over its full range of motion.  The driver side tank is the last to be fully drained so its sensor tends to be exercised over only the upper part of its overall range of motion.  Thus the sensor's electrical windings in the potentiometer do not get a cleaning wipe by the pick-up very often.  I THINK the result is the lower portion of the potentiometer develops some kind of contamination that effectively shorts most of the lower windings together.  So as the fuel level drops the potentiometer wiper gets shorted to ground.  The computer then thinks the tank is empty.   Regardless of the cause, research on the various Corvette forums (and as experienced by several club members) indicates 99% of the time that this problem crops up it can be solved by adding a bottle of Techron Concentrate Plus to your next one or two fill-ups.  Be sure you get the Concentrate Plus; it is available at better automotive stores.  As I understand it, chemicals in the additive clean the deposit off of the fuel level potentiometer windings.  If this does not work, try GM's additive (more expensive as I recall).   If those efforts do not fix the problem then the fuel tank will need to be opened up and the sensor replaced.  I recommend a GM dealer for this work because special "exact torque" screws are used to prevent over tightening and stripping out the threads when closing the tank.  A poorly trained mechanic might use the wrong screw resulting in under tightening (and a leak) or over tightening (stripped threads and also a leak).  

Your Answer

Chevrolet Corvette Experts

  • #1
    John Carson
    Reputation
    2,620
  • #2
    Vincent Parker
    Reputation
    1,870
  • #3
    carGrrl
    Reputation
    1,470
View All

Related Models For Sale

Used Chevrolet Camaro
398 Great Deals out of 31,485 listings starting at $3,495
Used Ford Mustang
341 Great Deals out of 42,378 listings starting at $1,488
Used Porsche 911
124 Great Deals out of 5,288 listings starting at $10,099
Used Dodge Viper
217 listings starting at $30,195
Used Chevrolet Silverado 1500
2,684 Great Deals out of 157,100 listings starting at $1,000
Used Ford F-150
3,046 Great Deals out of 230,455 listings starting at $1,300
Used BMW M3
30 Great Deals out of 1,860 listings starting at $5,495
Used BMW 3 Series
1,117 Great Deals out of 34,037 listings starting at $1,209

Used Cars For Sale

2018 Chevrolet Corvette For Sale
3 Great Deals out of 3,037 listings starting at $47,941
2017 Chevrolet Corvette For Sale
12 Great Deals out of 3,693 listings starting at $41,795
2016 Chevrolet Corvette For Sale
10 Great Deals out of 984 listings starting at $39,990
2015 Chevrolet Corvette For Sale
17 Great Deals out of 728 listings starting at $36,995
2014 Chevrolet Corvette For Sale
3 Great Deals out of 723 listings starting at $33,990

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.