You have a bad alternator. Get the alternator checked, the alternators in 98 cavalier require at least 13 to even start the car off of battery power. The alternator is what charges your car's battery while you are driving. if you have bad alt then your jumping the car is pointless cause it won't harge your battery at all it just kick starts the engine with power from the other vechile. If the alternator is showing at the very least more than 15 when its tested time for a new one. They should run about $90-110, it's an easy do it yourself installation to. Good Luck!!!
SOURCE: my info box keeps the battery it and my gauges
im assuming that the battery trouble light is lit on dash check connections for loose ,corroded,or damage wiring at battery and alternator aslo check belt that it is not loose and slipping at alternator if good have both tested at an auto store most stores do this for free alternator may not be charging battery and or battery not taking and holding charge [new doesnt mean cant be defective]
SOURCE: I have 2001 Tahoe battery
Normally when the fuel sending unit is the issue, the battery will be affected if there is a short in the circuit but that would cause fuses to go out and you may not start the car until the fuses and the short are fixed. Check the voltage of the battery if it is around 12.7v. It should still be good.
As for the fuel it could be he ignition system or the fuel sending unit (that is the fuel pump and the electronics that go with it). I would check first the ignition system. That is the distributor coil and the cables that go with it. Check for loose wires or loose connections. The distributor would send signal to the ECU to tell the pump to start sending fuel. Check also the pump. If you can bypass the relay and have the fuel pump connected directly to the battery to test if it will work. If it does, check the relay and the wiring otherwise your pump may be bad. It could also just be a fuel filter that needs to be replaced.
If you have access to a scanner it would be best to use it and see if errors are retrieved. If there are errors it would help you identify the issue accurately.
SOURCE: 96 s-10 when driving my volt gauge goes up down
This a sign of the charging system at fault.......i would check with a multimeter at the battery....and when the vehicle is running/idling, it should be between 13.8 and 14.2 volts.......if this is not the case, either the alternator needs to be replaced, or wiring may ned to be checked......
SOURCE: 2002 chevy cavalier gauges not working - battery
Start the car. remove the cluster fuse from the fuse panel to the left of the dash. Wait 5 seconds and reinsert the fuse. It should be fine until you replace the battery again.
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