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BMW 3-Series (E90 E92) Forum
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Help with rough running.
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| 04-28-2014, 07:35 AM | #1 |
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Help with rough running.
A month or so ago I installed an Injen dual intake on my '07 335xi, then followed up a couple of weeks later with VRSF catless DP and the check engine light came on. I also noticed a black soot accumulation on the exhaust pipes. Installed Stage 2 LT aggressive tune this past Saturday and went for a test drive. Check engine light was out and the car ran fine for about 10 miles. On my return the check engine light came back on and car ran very rough especially on acceleration. Thoughts? I am planning to take it to my local wrench to get codes read.
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| 04-28-2014, 08:48 AM | #3 |
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Plugs or Coils most likely
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 2008 335xi Jet Black//Coral Red VTT Stage 1+// Procede V5//VRSF DPs//AMS FMIC//KW V1//M3 Sways & Sub Bushings// Alpina AT flash Apex EC-7//Michelin PSS//Dinan CAI |
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| 04-29-2014, 06:55 AM | #8 |
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As an after thought I doubt o2 sensors as the car ran fine before I added the tune. Before the tune I noticed the carbon soot build up but no performance issues. After I added the tune all the problems began.
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| 04-29-2014, 07:19 AM | #9 |
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try plugs first, then coils, then injectors
Try going WOT... you'll most likely throw a code, which will at least point you in the right direction
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2008 335xi Jet Black//Coral Red VTT Stage 1+// Procede V5//VRSF DPs//AMS FMIC//KW V1//M3 Sways & Sub Bushings// Alpina AT flash Apex EC-7//Michelin PSS//Dinan CAI |
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