Question about 2006 Jeep Grand Cherokee
When key is turned to on fuel gauge reads correctly. When engine is started, the fuel gauge goes to the full or even overfull position.
Posted by Anonymous on
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Posted on Jan 02, 2017
The ground has corroded off the sending unit.You can access this by drilling out the rivits in the access panel under rear seat on drivers side.
Posted on Nov 09, 2008
Assuming I understand your problem correctly, it sounds as if the car will only start once the check engine light comes on. The check engine light is controlled by the PCM (powertrain control module; or computer) which is also responsible for basically all engine operations including fuel delivery, ignition, emissions, and so on. If this light is not coming on, it means that the computer is not getting power. If the computer is not getting power then it won't start. The fact that you hear the relays click on when the light comes on is another indicator the the computer is not getting power as it also supplies power to the ASD (Automatic Shutdown Relay) which in turn supplies the power to the fuel and ignition systems. Check the ASD relay located in the power distribution center, if it is the same relay number as another un-important system, then swap it out to see if that helps. Make sure the plugs going into the computer are tight. The delay in the power going to the PCM sounds like a stuck relay, have someone tap the relays when the light is off to see if comes on. It is also possible that the PCM itself is failing.
Posted on Dec 16, 2008
There could be two problems here:
1. That buoy floating tank is not working properly
2. That the electrical system that fails to submit the dashboard.
Review this information:
Page 2 - Fuel Gauges description
Page 4 - Voltimeter/Tachometer/Fuel Gauge/Low Fuel Inoperative
Page 10 - Specifications
About Fuel Tank components
Fuel Tank and Gauge & Sensor Units Sending (Page 93 and next)
Good luck... and remember rated this help.
Posted on Aug 14, 2009
if the gauge starts a 0 - goes to 1/2 , than full - sounds like gauge is OK - seems to me like the sending unit is bad - you could try removing the sender and trying to clean out the port with "brake clean", letting it dry than re-installing it. the pressure switch is still the least expensive place to start
Posted on Oct 27, 2009
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