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BMW 3-Series (E90 E92) Forum
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Need help diagnosing engine - No Codes Thrown & Extremely Sluggish - Logs Attached
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08-27-2014, 04:38 PM | #1 |
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Need help diagnosing engine - No Codes Thrown & Extremely Sluggish - Logs Attached
Hey guys - I have been scratching my head on this one for a while and thought I would reach out to the forum for suggestions.
Car: 2007 e90 335xi Installed mods: JB4 G5 ISO (map 7), chargepipe with BOV, dci, inline lpfp. ECU: Flashed with ***********'s race flash (e85, meth friendly) Gas: ~100octane, ~E60 mix (e85 with 93 octane). Symptoms: Oil leaking around engine bay - top of plastic and hot side (I'll be replacing the valve cover gasket and oil filter housing gasket soon when I do the next oil change...just started med school so basically this will take a decent weekend to tackle). Car in general feels VERY sluggish. Engine sounds like it's working it's ass off, but not gaining any real power. I can definitely tell the engine is making a different sound when getting on it a bit (higher pitched and not efficient...like it's not using all it's potential). I've been babying it other than the pulls for these logs...worried it's something very serious with the engine. I plan on reflashing the stock tune back, removing all the mods and dropping it off at the dealer soon. It's a bit of a pain though and I'm going in blind - does anyone have any ideas what it could be? The car ran like an absolute BEAST before a cross-country trip from California to the midwest (regularly targeting 17psi without issue). Somewhere on the drive, things fell apart....help!! I appreciate any thoughts you might have. I know it's a pain in the ass to look at logs, but any help on here would mean a lot. Thank you in advance. **UPDATES** * One code: 2C7E Lambda probe behind catalytic converter, trimming control * Checked vacuum lines and pressure to each turbo is 20 - so that's good. * Checked chargepipe - no cracks and everything is sealed tight. * I of course have the wastegate rattle like everyone else - didn't affect performance before though... Last edited by alien2936; 08-27-2014 at 09:00 PM.. |
08-29-2014, 05:06 PM | #2 |
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Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
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Do an intake valve cleaning (scrubbing) and it walnut blast.
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Appreciate
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