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Old 02-23-2012, 08:19 PM   #1
VSanj
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HELP!!!! INSTALLED M3 EXHAUST ON 328is E36...car is idleing rough now

hey peeps.

got a good deal on a m3 exhaust for my 1997 e36 328is. Had a huge hole in the supersprint........

anyways, installed and now car runs fine EXCEPT.....every now and than engine sputters and misfires on idle.....you can see the rpm dropping and hear a sputter from teh exhaust.

any ideas????????/
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Old 02-23-2012, 08:37 PM   #2
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I'd start by checking for vacuum leaks. Then check the coils and plugs.
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Old 02-23-2012, 08:54 PM   #3
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This was immediately after the swap?
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Old 02-23-2012, 10:07 PM   #4
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^^yes sir!

thx for the info doogee!
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Old 02-23-2012, 11:10 PM   #5
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What exactly did you swap out, cat back or full exhaust?

Could be you have a good leak.
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Old 02-24-2012, 02:52 AM   #6
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Did you Unplug the vacuum line that goes to the stock 328is exhaust?
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Old 02-24-2012, 08:00 AM   #7
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Were is the vacum line located?
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Old 02-24-2012, 09:23 AM   #8
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I think he is talking about the vaccum line that goes to the dashpot on the muffler to control idle noise. This shouldn't make a difference.

Did you swap the whole exhaust including the cats?
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Old 02-24-2012, 10:47 AM   #9
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^^it could actually, but since he had a supersprint before its likely already plugged.
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Old 02-24-2012, 12:39 PM   #10
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no just swapped the muffler
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Old 02-24-2012, 12:49 PM   #11
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Sounds unrelated to exhaust, an exhaust leak is very unlikely the cause of a drive ability issue. Like doogee said, coils, plugs, vacuum leak.
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Old 02-25-2012, 12:30 AM   #12
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Just the muffler? That is why I asked what exactly you swapped.

Bro, your issue is not related to a muffler, unless of course that muffler has 5 bananas in it.
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Old 02-25-2012, 12:39 AM   #13
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