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E34 (1989 - 1995)

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  #1  
Old 08-22-2012, 07:56 PM
EasyE38 EasyE38 is offline
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Thumbs up First Bmw

Just got my daughter her first car. 1994 525i. I love the car, having couple issues tho. Car stalls out while driving, happened couple times during the day today and tonight when I turned on headlights it dies out. I shut off head lights and it comes back. Stomp test produced codes 1221 and 1222 if Im reading them correct(Big ups to the stomp test thread, great reading). Any help , ideas will be appreciated. Back to a DIY if I can.. Thanks E
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  #2  
Old 08-22-2012, 09:09 PM
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luckydog luckydog is offline
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sounds like you need at least a $200 battery ,these cars go through them. Also the alternator could be not charging the battery enough. A starter going out can ruin a battery. I think the stalling is voltage related. those are symptoms of a failing battery.
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  #3  
Old 08-22-2012, 09:15 PM
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BMR_LVR BMR_LVR is offline
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Get your hands on the Bentley manual. It will help you work through the problems. It can be purchased in hard copy or downloaded for free. Search "Bentley manual" on this forum or Google and you will be able to find it.

Good luck.
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  #4  
Old 08-23-2012, 12:01 AM
paperplane94 paperplane94 is offline
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Mein Auto: 1989 525i M20B25
Bentley manual DL:
http://www.bimmerwerkz.com/forum/5-s...0-a-42558.html

If I were you I would test the battery voltage while the car is off and while at idle using a digital Multimeter.
You can also have the alternator removed and tested by a local auto parts shop.

Low battery voltage would explain why you are getting incorrect air/fuel ratios sensed by the O2 sensor. This is why a code is stored when the car stalls out.
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  #5  
Old 08-23-2012, 05:39 AM
snowsled7 snowsled7 is offline
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I would put that battery on a charger overnight, and have an appointment with a shop in the morning for a starting/charging system test. Might cost $40-60 but you will know which components are good, and which are not.

As mentioned, it could be the battery, battery cables, starter, or alternator, and likely a battery and an alternator

Or, you can remove the same items and have them tested, usually for free at the parts store.
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  #6  
Old 08-23-2012, 05:58 AM
SwissCheeseHead SwissCheeseHead is offline
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+1 with paperplane

No need to have everything removed. A voltmeter can tell you a lot. A battery with the car off should read about 12V while a battery with the car on will read 14V. If it's getting 14V, that means the alternator is working. If it is getting less, then your alternator is not charging the battery and needs to be replaced. You should not "go through" batteries. They should last at least 3-5 years. If not, your alternator needs replacing.

Does your battery light come on as you drive and it stalls?
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  #7  
Old 08-23-2012, 06:29 AM
snowsled7 snowsled7 is offline
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A fully charged battery should read 13.2 volts. The alternator should be charging slightly above that.

What your voltmeter can't do that the shop can, is apply loads to the battery and alternator. Those are proper tests of those components, as well as the starter ampergae draw test.

If you detect a higher voltage running, the alt is probably good. Just because it is producing voltage at idle, does not necessarily mean it is delivering the amperage needed to run accessories and charge the battery too.

I normally do not advocate the shop route but for the cost of this simple test you can really find out the current condition of all the components. So winter is coming, and this is your daughters car? Why mess around?
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Last edited by snowsled7; 08-23-2012 at 06:32 AM.
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  #8  
Old 08-23-2012, 07:37 PM
EasyE38 EasyE38 is offline
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Thanks for the response. I have appt. for tomorow with local bmw tech. I would like to test battery- dumb question , but where is it located in the 525? Under the rear seat? thanks and I will let all know how i make out.
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  #9  
Old 08-23-2012, 07:42 PM
93tillInfinity 93tillInfinity is offline
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Keep us posted
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  #10  
Old 08-23-2012, 08:10 PM
ThoreauHD ThoreauHD is online now
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Mein Auto: 02/1994 530i 8cylinder
Under the back seat. Just step in the car, grab firmly with your hands on the bottom where the carpet meets the seat, and yank the living **** out of it going straight up. You can pick up a battery at any auto parts store and swap it out yourself if you are so inclined.

The car will be right as rain in no time. It's very easy to work on this model. If it was a newer one, not so much.
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  #11  
Old 08-23-2012, 10:28 PM
paperplane94 paperplane94 is offline
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  #12  
Old 08-27-2012, 06:26 AM
EasyE38 EasyE38 is offline
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Update: My local tech found a bad ground, causing voltage drop and bad running issue. Got that straightened out... car is running good. he recomends new water pump, can feel some play in bearing and replace belts at same time. has new radiator from previous owner and from what i read in other threads it is a good idea to maintain the cooling system. thanks again for the great response and info. thanks for video of back seat also as im going to try and replace blown rear speakers ... Emyride
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  #13  
Old 08-27-2012, 11:12 PM
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luckydog luckydog is offline
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Thanks for the update. Im a little skeptical on you mechs diagnoses on the cooling system.If one part is fatigued the whole system may be too. Doing the cooling system should be 4 to 6 components all at once a little over $500 if you do it yourself. Fan clutch ,radiator, pump, therm, hoses ,belts. The pumps get loud and leak when they begin to fail. If i were in your shoes I would just test the fan clutch and maybe replace it if its old. Its the only part i have seen that really has failed, twice.

Last edited by luckydog; 08-29-2012 at 12:08 AM.
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  #14  
Old 09-03-2012, 11:43 AM
Toysoldier571 Toysoldier571 is offline
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Location: Reston, VA
 
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Mein Auto: '94 BMW 525i
Yea man thats a nice car i hve a one too (94 bmw 525i) and ny family has owned it since 1993 .. n its my time to deal with o upgraded the sound system .. let me tell u ppl goes "wow" when they see it lol all shiny and clean ..anyways just wanted to share that
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  #15  
Old 09-05-2012, 04:11 AM
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BMWFatherFigure BMWFatherFigure is offline
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Quote:
Originally Posted by snowsled7 View Post
A fully charged battery should read 13.2 volts. The alternator should be charging slightly above that.

What your voltmeter can't do that the shop can, is apply loads to the battery and alternator.
Hate to tell you, snowsled7, but you can load a battery and / or alternator just by turning on various systems ie headlights; HRW; air con. You can also measure accross joints and earths to locate volt drops.
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  #16  
Old 09-05-2012, 05:55 AM
snowsled7 snowsled7 is offline
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Quote:
Originally Posted by BMWFatherFigure View Post
Hate to tell you, snowsled7, but you can load a battery and / or alternator just by turning on various systems ie headlights; HRW; air con. You can also measure accross joints and earths to locate volt drops.
...and those measurements will get you closer. Unless you have an expensive multimeter that can handle the amps of the 12v system, you are still missing the whole picture. You are using bush methods and, I understand that. Coupled with some good knowledge that will probably get you there. I didn't mean to suggest that is how I would do it, I would figure it out at home. Giving a reccomendation like that on the internet to a dad trying to help out his daughter didn't seem prudent. People that have the tools, talent and time would just fix it. People who ask about basics on the web are probably lacking one of the three T's. Do you think my reccomendation was wrong? That is what this should be about, not the semantics of my posts.
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'98 750iL '86 325(e)/5
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  #17  
Old 09-05-2012, 06:38 PM
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BMWFatherFigure BMWFatherFigure is offline
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Hi snowsled7, I read it as Easy E38 has some tools and a multi-meter. Yes I have tools, equipment and skills to do all 'shop' tests including starter draw test. However, simple voltmeter readings will show defective items without a trip to the shop and give a reasonable starting point for repair proceedures, even if that means a 'trip to the shop'. I didn't think you were wrong, just not giving alternate basic options.

It's hard to know the T's from a queery. Some people don't read the owner's hand book and some mention typo's in workshop manuals.

Last edited by BMWFatherFigure; 09-05-2012 at 07:22 PM.
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