93 jeep grand cherokee gas guage doesnt work. It seems to have started after I replaced the fuel pump. Neither the guage on the dash, or the overhead console give accurate readings
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If the check engine light does not light up on the dash when you turn on the ignition, at those times when your jeep doesn't want to start, then your main jeep ecm is in need of repair. The fuel pump relay will get energized only after that check engine light comes on. It's a known problem, especially with the first and second year production Grand Cherokees, 93 and 94.
can you hear the pump run?? if you can i would start by changing the fuel filter before i droped the tank... also did you check your relay for the fuel pump, under the hood?? the sending unit doesnt send the fuel to the engine, the sending unit is what operates your gauge... so, if your pump is junk and got to drop the tank, the sending unit is built in the pump, so kill 2 birds with one stone, and replace the fuel pump assembly, and everything will work.
hope this helps
sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered
Will it try to start if you spray some carb cleaner in the throttle body? If so you need to check fuel pressure and if low, power to the fuel pump while cranking, the gauge not working could be a seperate issue. Could it be that the car is out of gas since the gauge doesn't work? Just asking. If so you may just need a sending unit. If you end up needing a fuel pump, you'll get a sender with it. I've never seen a sender and a pump go out at the exact same time, the use two different circuit's. The ECM really doesn't have any thing to do with the fuel gauge on this car.
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