Question about 1998 Oldsmobile Bravada

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My bravada sometimes stalls.The voltage goes down when I am at a stop .When I try to go,it doesn't want to go and sometimes stalls out.While I'm driving it's fine and the voltage is good.One time when I started it,the voltage was way down and the batteryn light was on.I had the battery checked.It was good.I also unhooked a battrey cable while it was running and it stayed running.

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Have your alternator checked, the voltage regulator which is an internal part in your alternator may be going bad and when there is an electrical load. The alternator does not produce enough voltage. That a multi meter and check your voltage at the battery, engine not running you should have 11.5 to 12 volts.
With the engine running you should have 13.5 to 14.0 volt reading at the battery, turn on your A/C blowers on high and head lights on and you should still have a minimum of 13.5 volts at the battery.
If your readings drops less then 10 volts, the Bravade ECM will shut down the fuel pump or the voltage is to low for the electric fuel pump to keep the fuel pressure at 56 PSI which will cause the fuel injectors to stop working.
Thank you or using fixya and good luck.

Posted on May 10, 2010

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I'm having the same problem in my 02 bravada and I don't think the voltage regulator is the problem because your car will still run since the battery is connected and has 12 volts... Your car can run even if your alternator isn't working at all. Right?

Posted on Sep 16, 2014

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