Gas gauge random stopped working
01-12-2014, 08:19 PM
#1
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Location: islip terrace NY
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Year: 1995
Model: Cherokee
Gas gauge random stopped working
Any idea on what it would be. Truck ran fine one minute. A few hours later went to start it and it was giving me trouble starting and the gas guage is no longer working after that
01-12-2014, 10:06 PM
#3
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Model: Cherokee
Trouble starting how? My gas gauge fails sometimes when I'm below half a tank. But I'm thinking its because my check valve is bad. Try this if it keeps going, cycle your key a few times then try starting.
01-12-2014, 11:18 PM
#4
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Year: 1999
Model: Cherokee
Engine: 4.0
Something in my head is screaming CPS.
I think one of the signs of a bad CPS is your gas gauge just randomly dropping to 'e'.
Research it. I'm going to bed.
I think one of the signs of a bad CPS is your gas gauge just randomly dropping to 'e'.
Research it. I'm going to bed.
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01-13-2014, 05:16 AM
#8
CF Veteran
1) check fuel
2) Do you hear your fuel pump prime when you turn the key to on?
3) Do you have any fuel pressure at the rail?
2) Do you hear your fuel pump prime when you turn the key to on?
3) Do you have any fuel pressure at the rail?
01-13-2014, 11:22 PM
#11
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Year: 1998
Model: Cherokee
Engine: 4.0L
97+ the fuel gauge sending unit is directly connected to the PCM, besides fuel gauge control is used by the PCM to control the evap system and other engine functions.
97+ a faulty fuel gauge sending unit or wiring can potentially cause driveablitiy & starting problems.
Symptoms are usually intermittent, the fuel ga. may behave ok for a while then get worse, then work ok again for a while, as time progresses may eventually begin to cause driveability and starting problems.
Previous years may be different where the PCM is not using fuel level data. I think the fuel gauge may be directly controlled by the fuel ga. sending unit. I don't have any wiring schematics for earlier years.
For all years I would inspect the fuel pump relay and wiring.
97+ 12 volts power and ground is fed to the fuel pump and fuel gauge sending unit along with two additional PCM signal wires.
97+ a faulty fuel gauge sending unit or wiring can potentially cause driveablitiy & starting problems.
Symptoms are usually intermittent, the fuel ga. may behave ok for a while then get worse, then work ok again for a while, as time progresses may eventually begin to cause driveability and starting problems.
Previous years may be different where the PCM is not using fuel level data. I think the fuel gauge may be directly controlled by the fuel ga. sending unit. I don't have any wiring schematics for earlier years.
For all years I would inspect the fuel pump relay and wiring.
97+ 12 volts power and ground is fed to the fuel pump and fuel gauge sending unit along with two additional PCM signal wires.
Last edited by Anony; 01-13-2014 at 11:42 PM.
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