Question about 1996 Mercedes-Benz C-Class

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After diconnecting and charging the battery I cannot get the car to idle even after going through the normal proceedure . Could it be something as simple as sparkplugs and a coincidental fault ?

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Make sure you put all connections on battery. Sometimes small leads coming off battery cables break and/or come loose. Benz have a notoriety of ground issues. check grounds near battery or on fender sides. Also check for loose or cracked vac hoses

Posted on Jan 03, 2011


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Posted on Jan 02, 2017


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96 cadillac eldorado etc battery not staying charged when the car is started the battery goes up to 14 when driving and press brake voltage drops 11-12(car may even die) and to 13+ if u give it gas

Does the vehicle start after sitting over night or do you need to jump start it . Is the charge light on ( batt. symbol ) at any time ? Serpentine belt good , tensioner good ? Battery cable connections good an tight and no corrosion ? Battery also good ? That is normal for battery voltage to jump up to 14 volts after starting , alternator is replenishing the battery after starting ,that draws down the battery . Going down to 11 or 12 volts when stopping and almost stalling isn't a charging system problem . You have a idle problem , IAC - idle air control valve or dirty air passage , a vacuum leak . Giving it gas and it going up to 13+ the alternator is working . Your best bet take it to a qualified repair shop and have it check .

Jan 27, 2017 | 1996 Cadillac Eldorado

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2007 Hyundai Accent revs up in idle. Normal?

Ask your Mechanic it sound like the TPS could be going bad.

Aug 18, 2013 | Cars & Trucks

1 Answer

Battery died alarm keeps going off when i try to enter car or start it how do i diconnect the alarm

You will have to have a charged battery firstly. If you have a key over-ride on the alarm siran housing turn it OFF. If you have jumper cables connect them to your vehicle (observing polarity) Negative jumper cable should be connected lastly ! When connected , operated the alarm blip as normal and you should be able to silence the alarm and start vehicle as normal. If the battery is in a weak condition it will drop a lot of voltage(while cranking) and reset the default setting on the alarm (ie ON) So good connections and good battery voltage. If it does go off , it'll be only for a few moments and it's your vehicle anyway so ! Good Luck

Dec 18, 2010 | 2005 Scion xB

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How do I know my car give correct charging to the battery. It seems that every time my car is in idle all the lightings, fan, headlights is almost dying, but If i will put the RPM to 1200 up everything...

It sounds like you have low voltage at idle.

This could be the alternator, voltage regulator, or even the battery. It could also be as simple as connections, but not likely. It could even be a loose or slipping alternator belt, but I think you would have heard some squeeling noise if that were the problem

testing the charging voltage to the battery is pretty simple, and some car parts places will do it for you. I know some autozones will do this for you.

Start with getting your charging voltage tested. Alternator/voltage regulator is the most likely, but a battery that is drawing too much charge current can do this as well.

Oct 01, 2010 | 1998 Toyota Corolla

2 Answers

My battery light came on and my battery dies like i aint getting a charge and when i charge the battery it starts everytime alternater is good what could it be

How do you know alternator is good?
Put in a cheap volt gauge.
Should read 12.5 normal.
Down to 10 starting.
Back to 12.5 at idle.
Up to 13.5 when engine revved up.

But battery low on water will not hold charge.
Could also have internal short.
Volt gauge will show.

Could also have something staying on, like engine or trunk compartment light?
Pull one battery terminal, and see if test light lights up across gap. If it does, even weak, you have a constant drain. Could be alternator. When diodes go bad, alternator can drain battery. Disconnect things until light goes out.

Feb 24, 2010 | 1999 Ford Taurus

1 Answer

My truck will not start and idle normally

check alternator fuse link and fuse.make sure alternator electrical wires is not will need a haynes repair manual to locate fuse and fuse link.

Jan 01, 2010 | 1993 Isuzu Pickup

2 Answers

Dead battery on tahoe 2005 - now no power to ignition

provided you disconnected the battery before you charged it, its probably just a new battery you need, but if you did not diconnect it you have probably done damage to the starter motor and maybe the alternator and god knows what else

Jun 13, 2009 | 2004 Chevrolet Tahoe

2 Answers

Not charging at low idle

How have you determined "not keeping up"?

We need to diagnose whether the culprit is the alternator or battery (or something else like an accessory drawing more than normal current)

With a digital voltmeter (not analog) , measure battery with car off, then compare battery at idle.
Off reading = about 12.6 - 12.8 volts DC
Idle reading must be higher than above or no charging will take place, Idle volts typically 13 - 13.5 and should increase a bit with RPM until regulator limits the increase.

Some possibilities are :
  1. bad diode in alternator (can be replaced separately in many alternators)
  2. bad regulator (built-in to modern alternators)
  3. bad connection at battery terminals (wire brush or use battery terminal cleaning tool)
  4. bad battery (shorted cell, often caused by allowing water level to go below tops of lead plates)

Oct 25, 2008 | 1987 Toyota Land Cruiser

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