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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 09-15-2015, 06:55 AM
wan_cubby wan_cubby is offline
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Location: Georgia
 
Join Date: Feb 2012
Posts: 26
Mein Auto: E46 323i
random power loss problem

Hi all
I have strange problem on my 2003 320i (M54 engine) sometimes it drives perfectly and accelerates normal but sometimes it losses power, on acceleration rpm raises slowly and engine has a smothering noise (especially on high gears). I have inpa diagnostic tool but no one error found, all sensors working normal. I always use same 95 octale petrol
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  #2  
Old 09-15-2015, 10:53 AM
teklord69 teklord69 is offline
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Location: Lake Forest, CA
 
Join Date: Apr 2010
Posts: 998
Mein Auto: 2001 330ci 5-Spd
Have you done the basic tune-up stuff? Air filter, Fuel filter, spark plugs, cleaning the maf.. Also the o2 sensor can affect performance.
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  #3  
Old 09-15-2015, 12:43 PM
wan_cubby wan_cubby is offline
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Location: Georgia
 
Join Date: Feb 2012
Posts: 26
Mein Auto: E46 323i
air filter changed about 5000 km ago ( checked and no dirty)
Fuel filter changed 10000 km ago
Spark plugs changed 5000 km ago
it's possible that bad o2 sensor do not throw a error code?
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  #4  
Old 12-09-2015, 06:17 AM
wan_cubby wan_cubby is offline
Registered User
Location: Georgia
 
Join Date: Feb 2012
Posts: 26
Mein Auto: E46 323i
Hi
Still have a problem with power loss and slow acceleration, I bought OBD wifi scanner and saved some log files

cruise highway log files, average speed 70-100 kmph
https://www.dropbox.com/s/fxjgyiaw1s...93543.csv?dl=0

warm engine idle log file
https://www.dropbox.com/s/axqz9rw0s9...01027.csv?dl=0

I got only error P1619 (Map Cooling Control Circuit Signal Low) but engine temperature varied about 96-100C degree. can anyone tell me what is the matter with my car?
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