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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 08-15-2014, 11:24 AM
Pilot12 Pilot12 is offline
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Mein Auto: BMW 97 540i
Service Engine Soon Light!

Hey Everyone,
I just finished working on the radiator after buying a new cooling pipes/coils. in the process i emptied all of my power steering fluid and coolant and after i was done i placed everything back together. it was on the ramps for about a week. Now when I test drove it, i stopped at a stop sign and all of the sudden it, started to act weird and sometimes it would turn off when I stop. At that time the Check engine light turned on .I checked the temperature of engine its normal(110 Celcius) and battery voltage is 12.8 and 13.1. I researched the problem and most of the answers was and O2 sensor or whatnot. Any ideas?
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  #2  
Old 08-15-2014, 11:32 AM
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helmet75 helmet75 is offline
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can you get the stored/pending codes from the computer? that will go a long way to diagnosing the issue.
If I were a betting man, I would start with a vacuum leak caused by something you bumped and/or disconnected in your repair process. 99% of the time, the work you did caused the new problem. Even if it is unknowingly.
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  #3  
Old 08-15-2014, 12:24 PM
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bluebee bluebee is offline
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- What to tell newbies who ask why their SES/CEL light is on but who don't have DTC scan codes or why they have a misfire or stumbling, hesitation, rough idle, etc., but who don't post codes from an OBD scanner with their question (1)
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #4  
Old 08-18-2014, 09:46 AM
Pilot12 Pilot12 is offline
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Okay, so I finally scanned it with an OBD II and the codes were P0300 and P0304, and P0308. they are all engine misfires.
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  #5  
Old 08-18-2014, 11:38 AM
JimLev JimLev is offline
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Check all of the air ducts leading into the engine. One may be loose or not on correctly.
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  #6  
Old 08-18-2014, 05:39 PM
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JDeGraff89 JDeGraff89 is online now
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New coils? As in the coil above the spark plug? Yeah? If so.. Did you seat them in correctly. Are they tightened down enough.. Did you cross the wires.. Ect ect. I belive its an issue with your new coils.. If. They are well the coils I'm thinking of anyway
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Old 08-18-2014, 09:15 PM
edjack edjack is online now
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Quote:
Originally Posted by Pilot12 View Post
Hey Everyone,
I just finished working on the radiator after buying a new cooling pipes/coils. in the process i emptied all of my power steering fluid and coolant and after i was done i placed everything back together. it was on the ramps for about a week. Now when I test drove it, i stopped at a stop sign and all of the sudden it, started to act weird and sometimes it would turn off when I stop. At that time the Check engine light turned on .I checked the temperature of engine its normal(110 Celcius) and battery voltage is 12.8 and 13.1. I researched the problem and most of the answers was and O2 sensor or whatnot. Any ideas?
Soi, what was the battery voltage? Was it fluctuating between these values? You should see a solid 14 V with the engine at 1500 RPM.

How old is the battery?
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Last edited by edjack; 08-18-2014 at 09:16 PM.
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