Question about 1996 Cadillac Eldorado

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My volts keep dropping an it sputters and backfires batt is good and alternator is new

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Please check if the rectifier/regulator unit has failed or is weak.
This can create fault in the charging system and cause fault in the ignition.Check the battery ground , clean terminals.
So check this out and check the timing ofthe engine.

Posted on Oct 02, 2010

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Posted on Jan 02, 2017

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Think you have voltage regulation hassles. Assuming your connections are squeaky clean and have very low resistance, your charging voltage should be at least 14 volts. And when you turn on heavy drain accessories the voltage drop should be minimal. 13 volts is much too low.

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Hello, MY 2005 Nisan frontier will not start. About 3 days ago, the battery light would stay on after the engine started...had the battery checked and it was fine...then serviced it yesterday but it still...


Battery might seem fine on a routine check, but the crancking amp power is not there anymore, seems that your alternator is not charging it anymore, have the alternator checked and replaced if needed, the battery might need replacing too.

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97 checvy astro 4.3 6cyl. I replaced battery, Starter and the batt wont hold a charge. Is it possible to check the wiring from the alt to the starter without having to remove the alternator?


Yes, If you have a volt meter, jump and start engine, with engine running you should have approx 13.5 to 14.2volts that would tell me that batt is getting charged when engine is running. you said new batt would not hold a charge, I would be thinking about a parasitic draw(small amount of power) that in time will drain batt. things to look for are glove box lights, under hood lights that dont turn off. one easy way too see if you have a draw is to disconnect one batt cable, now use a regular (12volt non-self powered) test light and touch one end to batt cable and the other to empty batt terminal, with no light switches on and doors closed, this test light should not light and if it does then you have a drain on batt that will kill it say overnight.

Feb 12, 2011 | Chevrolet Astro Cars & Trucks

1 Answer

New batt. new alt, 97tercel. batt still runs down after a day or so. alternator puts out til headlights are turned on ,then the out put voltage slowly drops below 12volts.


REPLACE BATTERY CABLES THE POSITIVE CABLE FEED WIRE TO ALTERNATOR BROKEN ON INSIDE IF ALL IS GOOD YOU HAVE WRONG AMP ALTERNATOR.

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1 Answer

305 engine --The volts gage is dropping-- HELP


The gauge could be wrong,it could be defective,have the alternator checked,at the battery,it should read from 13.65 volts to 14.25 volts with the head lights on,and the ac blower on high,with the engine running.If the alternator is new,check for 12 volts at the back of the alternator with engine off,if there is not 12 volts on the large wire,on the alternator,then the circuit is broken somewhere.Just install a new wire,of equal or larger size.Leave the original wire on the alternator,and just add a new wire,larger would be better if possible,and run it from the alternator,to the positive side of the battery,it will fix the problem.

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Make sure all connections at alternator are attached. On some, the regulator is inside the computer and if bad, requires computer change.

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Charging problem 1991 volvo 240


14.6 means your voltage regulator or diode is suspect Despite having new alternator .Ive cross refrenced your smptoms in the haynes workshop manual and alternator is your only end answer.The haynes test is to start vehicle with multi meter connected across the battery terminals,increase the engine speed until the reading remains steady should be approximately 12 to 13v and no more than 14v.switch on as many accessories as possible(headlights heater blower radio etc)check that the alternator maintains the regulated voltage at around 13 to 14v.If the regulated voltage is not as stated then alternator is to be repaired/replaced.Good luck with it and a happy new year.

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1 Answer

Power draining, when lights are on and clicking in the engine


this sounds like an alternator problem. first chechk wires on alternator and starter make sure they are nice n tight , clean batt terminals and check engine and chassis ground . if you have a volt meter check n see if the alternator is charging minimum 13.2 v anything less is no good allso if it is above 13.2 then turn your lights n a/c on iv voltage drops then alternator is bad.

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