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My mg zr battery keeps going flat and I got told its the alternator. I noticed today while having a look that when I rev the engine a spark comes from the alternator. Does this mean the alternator is dead?

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Get the alternator checked. It should be charging at least 13.8v.
A normal voltmeter will work across the battery terminals.

Posted on Jan 19, 2009

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Murphybanton
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Check the whole connection in the hood for the charging system.

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is it a high pitched grinding noise?

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SOURCE: 2006 dodge grand caravan does it have a engine rev limiter?

these vehicles are equipped with a rev limiter..normal operating condition

Posted on Sep 13, 2009

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SOURCE: I have a H3 hummer but my truck battery keep going

The batteries they put in the trucks from the factory ****. I went through 3 of them under warranty, they lasted 6 months a piece.

I did research to find who made the factory model. I found an alternative manufacture and bought their battery and I have not had a problem sense. I bought a Duralast from auto zone.

Posted on Oct 15, 2009

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If it still works it shouldn't need replacing but fitting to a new case.

The last time I wanted one the cost from a dealer was stupidly expensive - really a rip-off.

I noticed the fob of an old Nissan Primera was the same and enquired at Nissan. They sold me a new case for just a couple of pounds.

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I RECENTLY had my engine replaced in my 2001 hyundai Elantra. This 'new' engine supposedly has only 10k miles on it. A new alternator had to be installed.The work was done by the dealer. I have had the...


The odds are the alternator is the problem again. I've installed brand new alternators in the shop that turned out bad. The battery barely had enough juice the crank the car and get it running. Then, the battery was the only thing keeping the engine running with the spark plug until the battery drain completely dead.

If the alternator was working normally, the alternator would have kept the energy up and keep the spark plugs going without the battery's help.

Basically, the battery's job is to start the engine only and the alternator's job is to keep the battery charged and supply energy for the car's needs.

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Car revs drop when using electrical items


To some degree this is normal, if it seems worse than before (I assume you have owned the car for awhile) then it is possible the battery is starting to go bad, if the battery is in a low state of charge then the Alternator has to work hark to keep the system voltage up, this takes engine power, up to 3 HP depending on the AMP rating of the ALternator, on bigger engines this will not even be noticed, on small engines like yours it will be noticed, one question, have you added anything that might be pulling allot of power? like a sound system amplifier? if so that is dragging the engine RPM down and you may need to upgrade the alternator to a higher amp rating unit.

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