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Car battery jump starts but won't hold charge?
Answer . \nGet a new battery, mine was doing the same thing. No matter how charged it is, youll still need a new one.
Answer . Answer. Check your alternator--a lot of times they go about the same time (for no reason).
Change it. Batteries do tend to fail in winter, they have to work that much harder.. It probably has a dead cell in it. Take it to an auto parts store, they will usually chec…k them for free - besides, you'll need to bring it in as a "core" trade that can be deducted off the price of a new battery.. Lead acid batteries have a long life if properly treated. An old battery will loose is capacity, especially when cold. There could be a problem with the charging circuit via the alternator? Over time the plates corrode and can internally short, the dielectric may need topping up. Perhaps something is discharging the battery that you might not be aware of? The radio? A light? If the battery is over four years old, replace it.
why after replaced the head gasket car wont turn over??jetta 2000 2.2l
DOES the engine turn over? if yes is there spark at the plugs? is there fuel to the injectors?
From your question, I assume the car will not start on the new battery alone, but will start if you add a "jump" to it. The bushings inside the starter may be worn and the sta…rter is dragging and not spinning fast enough to start the engine unless it has that extra "jump". Remove the starter and inspect it - sometimes grime and grit will get inside and prevent enough power to get to the armature to make it spin fast enough, Also test the starter by clamping the positive jumper cable on the post where the battery cable attaches and the negative on the "ear" of the starter where the bolts go through that attach it to the engine. Before you attach the negative cable, make sure the starter is secure because it will "recoil". If the starter spins easily, the problem lies elsewhere. If it is hard to spin, the bushings are worn or it may have a lot of dirt and grime inside. If you hear a definite metal-on-metal grinding noise, the bushings are badly worn.
It may be because the battery is still dead. Once the car is started with a jump, you need to let the car run for a while so the alternator charges the battery, or it is just …going to need to be jupped again and again and again. if your engine won't start after doing the above, it may because there is some other problem. Some possibilities are a bad battery, a fault with the starter motor or the solenoid or the wiring to them, a problem with the the ignition circuit, or the car's ECU (Engine Control Unit) has a fault. For more information and advice see the answers to the Related Questions shown below.
The most common reason is one of the cells in the battery is bad and the only thing to do is get a new battery
Why won't a car start without using jump leads to another battery but will start with jump leads to another battery?
Answer 1 - When Starting Requires a "Jump" There could be several causes, but I suspect that the basic reason is that not enough electrical current is getting to the starter…. The addition of another battery in parallel provides that extra "oomph" to turn the starter fast enough to turn the engine over fast enough to function and start. Some of the possible causes that I can think of right now include: . A battery which is unable to provide the amount of current [measured in Amperes (Amps)] which the starter needs to spin the starter and engine fast enough. . Corrosion build up on the contact surfaces at any point where connections are made , such as: battery/terminal/cable clamp connections, cable connections at the starter solenoid, connection of the cable at the starter, connections inside the starter such as, brushes to comutator etc. . A cable or wire to the starter that has been cut or damaged so that it does not have the same cross-sectional area [diameter] anymore, and therefore resists the flow of current. . A worn/defective starter solenoid. . A defective starter [as in worn out brushes or "dragging" bearings or bushings which reduce the Rpm of the starter. Answer 2 - Another Possibility? Maybe a defective ignition coil or high tension lead?
If the battery is fully charged and tests okay, check both ends of battery cables to be sure they are clean and tight. If you still get only a click the starter may be at faul…t.
You should never drive a car around for long after jump starting a dead battery. This puts an enormous strain on the alternator. Alternators are designed to keep a good batter…y charged, not to charge a dead battery. You can easily burn out a diode in the alternator. Jump start the engine and drive it somewhere and connect a battery charger to the battery and charge it fully.
Weak alternator, dead cell in the battery, or something is on pulling power from the battery when the cars is not running.
Fuel Pump Fuel pump is a possible culprit. It can also be a clogged fuel filter or defective coil, etc. You need to determine what is missing of the 3 things needed for the …engine to run. Fuel, Air, Spark. Once you do that you will know where to look.
You have a dead battery and need a jump start. There is the right way and the wrong way to accomplish a jump start safely. Because of the potentially severe hazards due …to improper use of jumper cables it must be done correctly. Auto batteries contain Sulphuric Acid which can blind you, or at the very least burn your skin. Also auto batteries vent off Hydrogen Gas which is highly explosive even from the slightest spark. Because of this danger it is critical to attach the jumper cables in a precise sequence. 1. Park the vehicle with the GOOD battery close to the vehicle with the BAD battery but do not let the vehicle touch each other. Make sure the cables are not routed so as to touch any moving parts, such as a fan blade. 2. Attach the jumper cable Positive + terminal to the GOOD battery Posi tive + terminal. 3. Attach the other end of the jumper cable Positive + terminal to the BAD battery Positive + terminal. 4. Attach the Negative - jumper cable terminal to the GOOD battery Negative - terminal. 5. Attach the last jumper cable Negative - terminal to a heavy metal ground part of the engine and NOT to the dead battery Negative - terminal. Reason being this last connection will cause a spark, and you do not want a spark next to the battery where it could ignite the Hydrogen. 6. If the engine of the donor vehicle with the good battery was not left running, start the engine and let it run for 2-3 minutes to put a charge in the bad battery. 7. Start the vehicle with the BAD battery and then remove the jumper cables from the batteries in the exact opposite order you installed them.
The alternator does not hold a charge. It charges the battery. If it will not charge the battery then either the alternator is defective, battery is defective, or the connecti…ons are corroded or loose. You should read 13.5 to 15.5 volts at the battery with the engine idling. Check it with a DC volt meter. If you get less the alternator is defective. If you get much more the voltage regulator is defective.