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Heritage Heritage is offline
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Join Date: Apr 2019
Car: 2008 535
Default Newbie (Subaru mechanic) Need some help! - 04-20-2019, 04:03 PM

Thanks for any Input..Came across a 08' 535/Sport Pkg (130K) for a very favorable price..Always wanted one.
Anyways..Car idles fine and quiet (all stock) however no boost, will smoke (burning oil smell) if I try to push at all.
Codes= 2AAF/30FF/2C7B/2CDC
I monitored the LPFP while driving and the PSI is within spec and not dropping off. No long cranks to start and the HPFP numbers are around 1600'ish if memory recalls.
Only thing I notice is a bucking while trying to go into any boost, smoke a CEL appears (large one) in display.
Tailpipes are showing oil, I being an Indy Subaru EJ255 master...assume the turbo's are shot. I did a smoke test today at my shop (initially from intake, then from multiple ports at vac canisters) and everything checked out perfectly.
My plans are to pull the turbo's...is there any possibility it's something else considering the oil residue/oil smoke?
I find it odd there's no boost with (2) turbo's however I am only familiar w/ my Subies. Feedback appreciated, would feel more confident knowing I am at least theoretically on the right track here.
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Ancient8989 Ancient8989 is offline
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Posts: 72
Join Date: Aug 2017
Car: 335i
Default 04-20-2019, 05:03 PM

My ST 335i has Fuel pump plausibility from a stage 2 upgrade. O2 sensor causing limp mode and no boost?
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Posts: 1,210
Join Date: Apr 2016
Car: 2008 E93
Default 04-20-2019, 05:05 PM

No boost and oil in tailpipes , I would lean toward turbos. I would check vacuum lines and boost solenoids either way. Also is the car running a Jb4 ? Maybe its on a no boost map of some sort ?
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