2AAF, 29E0, 2A2D

mwahlert · 08-26-2014, 10:23 AM

Background:

I am the second owner of this vehicle. I have inherited most records from the previous owner.

2008 335i e90, 110k miles. Stock.

HPFP was replaced @ 29,444 (13 51 7 613 933)
HPFP was replaced @ 37,620 (13 51 7 613 933)
LP fuel sensor replaced @ 37,620 (13 53 7 614 317)
Injector campaign @ 45,494 - one injector replaced (13 53 7 585 261)
Plugs most recently @ 83,041
Intake valve cleaning @ 91,605

I've had the car about 6 months. When I first got it I identified a leaking injector which was causing very rough starts. I replaced it with a used 261 injector to keep cost down, and this had resolved the very rough start.

Current:
I am now experiencing slightly rough cold starts, choppy part throttle acceleration, occasional limps, and occasional SES.

The limp seems to be caused by 2A87 VANOS - I'll replace or clean those.

2AAF, 29E0, 2A2D keep coming back after code clears.
I'm not sure if the fuel system codes are indicative of another HPFP failure, or weak LPFP, or LP sensor. Any help is appreciated.

Thanks.

JStang · 08-26-2014, 10:33 AM

Sounds like it could be your LPFP on the way out. Are you stock or tuned? Running 91 / 93 octane or any E85?

mwahlert · 08-26-2014, 10:39 AM

Quote:

Originally Posted by JStang

Sounds like it could be your LPFP on the way out. Are you stock or tuned? Running 91 / 93 octane or any E85?

Stock, 93.

mwahlert · 08-27-2014, 10:17 AM

Any additional input?

Thanks.

ragingpanda · 08-27-2014, 10:42 AM

I used to get 2a2d consistently when I would go WOT. When I replaced my lpfp, the issue was resolved.

Jnat · 08-27-2014, 02:09 PM

How did u diagnose the leaky injector?

Whateva · 08-28-2014, 09:54 AM

Quote:

Originally Posted by jnat

How did u diagnose the leaky injector?

Yes I would be interested in that too. I have leaky injectors and the dealer said I should replace all 6 due to having a leaky injector in each bank on my 08 e90. I'm very hesitant in replacing individual injectors, but that's because I haven't done my home work yet. Any information on how you went about investigating and changing individual injectors would be helpful. Thanks.

kfrazie1 · 08-30-2014, 08:57 PM

Welcome back!

You could see if your LPFP is on its way out by checking output pressure. I believe it's suppose to put out 72psig max but will default to max if there is a sensor failure.

Also, did you code the injector with INPA ?

N43B20A · 07-13-2017, 02:47 PM

Did you manage to solve the issues?

08-26-2014, 10:23 AM	#1
mwahlert Lieutenant Colonel 97 Rep 1,659 Posts Drives: 2009 335i Join Date: Apr 2008 Location: NC iTrader: (8)	2AAF, 29E0, 2A2D - HPFP or LPFP? Background: I am the second owner of this vehicle. I have inherited most records from the previous owner. 2008 335i e90, 110k miles. Stock. HPFP was replaced @ 29,444 (13 51 7 613 933) HPFP was replaced @ 37,620 (13 51 7 613 933) LP fuel sensor replaced @ 37,620 (13 53 7 614 317) Injector campaign @ 45,494 - one injector replaced (13 53 7 585 261) Plugs most recently @ 83,041 Intake valve cleaning @ 91,605 I've had the car about 6 months. When I first got it I identified a leaking injector which was causing very rough starts. I replaced it with a used 261 injector to keep cost down, and this had resolved the very rough start. Current: I am now experiencing slightly rough cold starts, choppy part throttle acceleration, occasional limps, and occasional SES. The limp seems to be caused by 2A87 VANOS - I'll replace or clean those. 2AAF, 29E0, 2A2D keep coming back after code clears. I'm not sure if the fuel system codes are indicative of another HPFP failure, or weak LPFP, or LP sensor. Any help is appreciated. Thanks. Last edited by mwahlert; 08-26-2014 at 10:35 AM..
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08-26-2014, 10:33 AM	#2
JStang Brigadier General 572 Rep 3,627 Posts Drives: FDB M3 CS Join Date: Dec 2010 Location: St. Petersburg, FL iTrader: (9)	Sounds like it could be your LPFP on the way out. Are you stock or tuned? Running 91 / 93 octane or any E85?
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08-27-2014, 10:17 AM	#4
mwahlert Lieutenant Colonel 97 Rep 1,659 Posts Drives: 2009 335i Join Date: Apr 2008 Location: NC iTrader: (8)	Any additional input? Thanks.
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08-27-2014, 10:42 AM	#5
ragingpanda Banned 340 Rep 751 Posts Drives: 135i Join Date: May 2012 Location: Florida iTrader: (0)	I used to get 2a2d consistently when I would go WOT. When I replaced my lpfp, the issue was resolved.
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08-27-2014, 02:09 PM	#6
Jnat DisplacementReplacement 849 Rep 1,419 Posts Drives: 2020 X3M Join Date: Sep 2012 Location: South Jersey iTrader: (0)	How did u diagnose the leaky injector?
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08-30-2014, 08:57 PM	#8
kfrazie1 Lieutenant 65 Rep 553 Posts Drives: 335i Join Date: Aug 2010 Location: NY iTrader: (4)	Welcome back! You could see if your LPFP is on its way out by checking output pressure. I believe it's suppose to put out 72psig max but will default to max if there is a sensor failure. Also, did you code the injector with INPA ?
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07-13-2017, 02:47 PM	#9
N43B20A Private 8 Rep 76 Posts Drives: BMW 318i N43B20A Join Date: Nov 2015 Location: DE iTrader: (0)	Did you manage to solve the issues?
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