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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 10-13-2012, 05:42 PM
BLU3VN0M BLU3VN0M is offline
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Location: Fort Mill, SC
 
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Mein Auto: '01 325i (DD), '03 Cobra
New to BMW's need help!!

Hey guys, i'm new to the site and new to BMW's. I just retired my daily driver '03 SVT Cobra and picked up my first Bimmer today, its a 2001 E46 325i. I'm having some issues with it, the service engine soon light is on, it's stalled a few times and has a very rough idle. I was told when i got it that the vacuum line needed to be changed, so i did that and it seemed to fix it for a few miles. I got on it hard and the CEL light came back on and seemed to loose power. After a few miles it went off and was fine. Got on it again and it came right back on. The codes it's throwing are: P0174B, P1351, and P1620. My plan for tomorrow is to clean the MAF sensor but im looking for some ideas as to what else i should do. Any and all help is appreciated!
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  #2  
Old 10-13-2012, 06:33 PM
Troubled1 Troubled1 is offline
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Mein Auto: 2001 330xi
Use the Search feature, try "intake boot" there will be a ton of info. Most of them say to check the boot that connects to the back side of the MAF for condition and security... Specifically cracks in the rubber. You could also search "power loss". Hope you figure it out.
James
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  #3  
Old 10-13-2012, 06:46 PM
Troubled1 Troubled1 is offline
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Check this one out.
http://forums.bimmerforums.com/forum...d.php?t=693261
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  #4  
Old 10-14-2012, 07:47 PM
BLU3VN0M BLU3VN0M is offline
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Mein Auto: '01 325i (DD), '03 Cobra
Okay, so i spend all day working on it. I found out i had a few more vacuum lines that i needed to replace, got all of them done. i've still got this P1351 code. I took off the #5 coil pack and started it, it had a bit of a change in the idle. Could it be the coil pack starting to go bad, a spark plug, or could it be something else?
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  #5  
Old 10-15-2012, 10:07 AM
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ahull ahull is offline
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Mein Auto: ist schnell! (03 330i SC)
I believe the procedure to test a suspect coil pack is to swap it to another cylinder and see if the error code moves with it. Some codes will clear on their own if the problem is corrected, some need to be reset with the scan tool. Not sure your level of diagnostic skill. Try just clearing the codes and see if it comes back. Plug could be fouled if you had a lot of vac leaks. Worth taking a look at.

Last edited by ahull; 10-15-2012 at 10:12 AM.
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  #6  
Old 10-15-2012, 10:52 AM
BLU3VN0M BLU3VN0M is offline
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Found the problem, it was a bad plug in cylinder 5. Changed all 6 and it's 100% better. I still have the thermostat code thats being thrown, and the cylinder 5 misfire... i guess im going to have to take it and get it cleared. Do you know if BMW charges to clear them?
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  #7  
Old 10-15-2012, 11:27 AM
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Fast Bob Fast Bob is offline
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Quote:
Originally Posted by BLU3VN0M View Post
Found the problem, it was a bad plug in cylinder 5. Changed all 6 and it's 100% better. I still have the thermostat code thats being thrown, and the cylinder 5 misfire... i guess im going to have to take it and get it cleared. Do you know if BMW charges to clear them?
For what a BMW dealer would charge you (for the "Diagnostic Time" ), you could (and *should*) purchase a code reader which will also clear the codes.
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  #8  
Old 10-15-2012, 11:38 AM
BLU3VN0M BLU3VN0M is offline
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It's pointless for me to go buy one because my buddy has a Mac Tools OBDII reader, im just at school right now and dont have access to it right now.
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  #9  
Old 10-15-2012, 12:23 PM
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Fast Bob Fast Bob is offline
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Originally Posted by BLU3VN0M View Post
It's pointless for me to go buy one because my buddy has a Mac Tools OBDII reader, im just at school right now and dont have access to it right now.
"Pointless"???? Not really....even if you used it once, then sold it for ten bucks less than what you paid for it, you`d *still* be $100 ahead of the game....
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  #10  
Old 10-15-2012, 12:26 PM
BLU3VN0M BLU3VN0M is offline
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Got a link for one of them?
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  #11  
Old 10-15-2012, 08:16 PM
amtjets amtjets is offline
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Mein Auto: 2001 325I and 2006 530i
If your ever in the Kannapolis, Concord area I have the reader and will reset it for you free! Got mine from Bavauto.com
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  #12  
Old 10-16-2012, 12:57 PM
BLU3VN0M BLU3VN0M is offline
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Mein Auto: '01 325i (DD), '03 Cobra
Thanks! i live just south of charlotte. Light ended up going off though, cleared itself!
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