Think my alternator went out

**Blumpkin** · #1: 08-05-2012, 02:22 PM

Yesterday my 08 lgt started to act weird on me. It would start up then just turn off, no sputtering so it isn't a fuel issue. I just used a volt meter and when on the car is reading 13.9V, so I am pretty damn sure it is the alternator. Anybody have any other ideas?

**Max Capacity** · #2: 08-05-2012, 02:33 PM

In all my years, if the car continues to start, the alternator is charging the battery.

13.9 is what the output is to charge the 12V battery.

**Blumpkin** · #3: 08-05-2012, 02:38 PM

the car will still start but with the alternator either going out or already out, the car is drawing directly off of the battery. I am just trying to find out if there is anything else that could be causing this issue.

**Max Capacity** · #4: 08-05-2012, 02:58 PM

I understand that.

There is another thread on here currently, that is kind of the same issue.

http://legacygt.com/forums/showthrea...es-190679.html

**Blumpkin** · #5: 08-05-2012, 04:27 PM

I was not throwing any codes on friday, and the car doesn't bog down at all, it literally just cuts off. I am driving a 5eat, I tried pumping the gas but it still cuts off. I have a really good warranty coverage so I am just thinking about taking the car to a mechanic, it's only a 50 dollar copay for anything they have to do.

**Max Capacity** · #6: 08-05-2012, 04:44 PM

Good plan.

**Blumpkin** · #7: 08-05-2012, 07:05 PM

One more thing I am gonna do before taking it in is use my buddies matco ecu reader to check for any codes I may have started throwing over the weekend

**Justin case** · #8: 08-05-2012, 08:52 PM

13.9 is a normal charging voltage=alternator is charging fine.

**xt2005bonbon** · #9: 08-06-2012, 04:57 AM

Quote:

Originally Posted by Justin case

13.9 is a normal charging voltage=alternator is charging fine.

^+1.

A simple thing to do as well is to check your battery terminals. It has happened more than once on this forum (me included) where one of the terminals gets loose and randomly shuts the engine off.

**Blumpkin** · #**10:** 08-06-2012, 09:20 AM

Yeah that was one of the first things I checked. I am waiting on a call from my mechanic right now so we will see

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**AkumaMax** · #**11:** 08-06-2012, 09:38 AM

Quote:

Originally Posted by Blumpkin

Yeah that was one of the first things I checked. I am waiting on a call from my mechanic right now so we will see

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Well good luck. BTW did you check both the Battery and Alternator? From reading anyway it sounds like a loose or unplugged vacuum hose if anything. I know when I was fiddling around with my car I forgot to plug in a hose by the BPV and it would start then die(FACEPALM). Doesn't sound like anything too serious though.

**05 LegacyGT** · #**12:** 08-06-2012, 09:51 AM

If the battery has enough charge to start the car, it certainly has enough charge to keep the car running at least for a short amount of time. This does not sound like an alternator issue.

**Blumpkin** · #**13:** 08-06-2012, 12:13 PM

A buddy thinks it might be a sensor. I am trying to get in at the shop today

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**F1inspiredLGT** · #**14:** 08-06-2012, 12:36 PM

Another option: take the alternator out and take it to a parts store and have them do a load test. This would solve your alternator guessing if it passes or does not pass the load test.

**Strizzy** · #**15:** 08-06-2012, 01:13 PM

What happens if you start it with the MAF connector unplugged?