Half Engine after 4th gear pull

CoralRed335XI · 01-06-2017, 10:26 AM

Hi all,

I've been getting somewhat consistent half-engine lights after 4th gear pulls (passing from like 50-80). The car pulls fine, but once I let off the throttle, the light pops up. I'm not tuned, but do have an ER CP with TIAL BOV. I did have my turbos replaced by BMW about a month ago also and never had this issue before that. I'm getting 30FE, 3100, and occasionally get 2AAF. I don't seem to have any issues at lower speed WOT runs. Any insight would be great before I bring back to dealership.

Thanks!

csu87 · 01-06-2017, 10:31 AM

hows your HPFP

CoralRed335XI · 01-06-2017, 10:34 AM

Quote:

Originally Posted by csu87

hows your HPFP

It was replaced a few months back.

CoralRed335XI · 01-08-2017, 09:36 PM

Any ideas?

CanadianTSi · 01-08-2017, 10:02 PM

Check for boost leaks.

Donutz · 01-09-2017, 08:14 AM

I had 30FE accompanied by 3100. For me changing vacuum lines and boost solenoids resolved the issue.

CoralRed335XI · 01-09-2017, 10:23 AM

Quote:

Originally Posted by Donutz

I had 30FE accompanied by 3100. For me changing vacuum lines and boost solenoids resolved the issue.

Thanks! That's more like what I was expecting. I don't think it's a boost leak as previously stated because I'm overboosting, not underboosting.

naoaki · 01-10-2017, 06:25 PM

I think that it is better to check the vacuum tank, vacuum line and solenoid.

CoralRed335XI · 01-10-2017, 08:04 PM

Quote:

Originally Posted by naoaki

I think that it is better to check the vacuum tank, vacuum line and solenoid.

Thanks for the input. What do I need to check with regards to the vacuum tank?

naoaki · 01-11-2017, 05:55 PM

Quote:

Originally Posted by CoralRed335XI

Thanks for the input. What do I need to check with regards to the vacuum tank?

It is a small crack in the vacuum tank. Please also check the breakage of the vacuum hose.

musa · 01-11-2017, 06:21 PM

Wait a minute, BMW replaced the turbos a month ago and you never had this issue before that? Hhhhm, points to something with the turbos install? Why were the turbos replaced in the first place? Didn't you get a warranty on them and install job? I would take the car back to them as a warranty job and then take it from there.

CoralRed335XI · 01-13-2017, 10:34 AM

Here's a quick 4th gear log which led to a half engine light when I let off the throttle. At the end of the pull, there's a requested boost of 0, but a boost PSI of 5.09:

http://datazap.me/u/marcschneider/st...-7-13-16-17-23

ritzzzzzwik · 01-13-2017, 10:47 AM

Boost Solenoids, or perhaps the wastegates are too tight.

Might as well put stick CP, and BOV on and have BMW take a look, since they just did the turbos.

B4LL3N · 03-17-2017, 12:32 AM

I'm getting a 3100 and 30FE, any resolution?

JuniorB · 03-17-2017, 05:19 AM

Check for hoses not properly tighten, or loose, and check cold side piping.

CoralRed335XI · 03-17-2017, 11:13 AM

Quote:

Originally Posted by B4LL3N

I'm getting a 3100 and 30FE, any resolution?

New boost solenoids fixed my problem.

SaugaSoul92 · 03-18-2017, 01:08 PM

boost solenoids fixed my problem..there really easy to change..just do them both

B4LL3N · 03-20-2017, 09:36 PM

Thanks, I'm beginning to think that may be where my issue is. Ordering a set.

MysticRob · 03-21-2017, 04:06 PM

Quote:

Originally Posted by musa

Wait a minute, BMW replaced the turbos a month ago and you never had this issue before that? Hhhhm, points to something with the turbos install? Why were the turbos replaced in the first place? Didn't you get a warranty on them and install job? I would take the car back to them as a warranty job and then take it from there.

Good advice here. Many things are removed during removal and installation, not the least of which is all the plumbing. I would have them recheck all work and look at your entire vacuum system. Might be as simple as the removal and reinstallation of old vacuum lines has loosened or cracked them to a point of being unusable.

Test the solenoids out before you spend a couple hundred dollars, or more if that's not the problem. Vacuum pump and gauge will tell you all you need to know about your vacuum pump, lines, wastegate actuators, tanks, and solenoids. Cheap insurance to save you from throwing parts at the issue without knowing root cause.

01-06-2017, 10:26 AM	#1
CoralRed335XI Captain 98 Rep 646 Posts Drives: 2008 E92 335XI Coupe Join Date: Aug 2011 Location: NJ,VA iTrader: (4) Garage List 2008 BMW 335XI [3.66]	Half Engine after 4th gear pull Hi all, I've been getting somewhat consistent half-engine lights after 4th gear pulls (passing from like 50-80). The car pulls fine, but once I let off the throttle, the light pops up. I'm not tuned, but do have an ER CP with TIAL BOV. I did have my turbos replaced by BMW about a month ago also and never had this issue before that. I'm getting 30FE, 3100, and occasionally get 2AAF. I don't seem to have any issues at lower speed WOT runs. Any insight would be great before I bring back to dealership. Thanks! __________________ 2008 E92 335XI, Space Gray on Coral/Fox Red Hybrid M3 seats, Premium, Cold Weather, Comfort Access, iPod. Mods: Fox Red M3 seats up front, KW V1, ER CP + TIAL BOV.
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01-06-2017, 10:31 AM	#2
csu87 Banned 2134 Rep 3,554 Posts Drives: 09 335xi Join Date: Nov 2013 Location: Northern Colorado iTrader: (0)	hows your HPFP
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01-08-2017, 09:36 PM	#4
CoralRed335XI Captain 98 Rep 646 Posts Drives: 2008 E92 335XI Coupe Join Date: Aug 2011 Location: NJ,VA iTrader: (4) Garage List 2008 BMW 335XI [3.66]	Any ideas?
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01-08-2017, 10:02 PM	#5
CanadianTSi Captain 207 Rep 602 Posts Drives: 2014 535 xDrive Diesel Join Date: Feb 2007 Location: Alberta iTrader: (0)	Check for boost leaks.
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01-09-2017, 08:14 AM	#6
Donutz Lieutenant 140 Rep 476 Posts Drives: 335i Join Date: Sep 2015 Location: Toronto, eh iTrader: (2)	I had 30FE accompanied by 3100. For me changing vacuum lines and boost solenoids resolved the issue.
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01-10-2017, 06:25 PM	#8
naoaki Registered 0 Rep 2 Posts Drives: 335i Join Date: Jan 2017 Location: japan iTrader: (0)	I think that it is better to check the vacuum tank, vacuum line and solenoid.
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01-11-2017, 06:21 PM	#11
musa Captain 423 Rep 900 Posts Drives: F86, E92, E53, E39. Join Date: Jul 2014 Location: Bellevue, WA iTrader: (0)	Wait a minute, BMW replaced the turbos a month ago and you never had this issue before that? Hhhhm, points to something with the turbos install? Why were the turbos replaced in the first place? Didn't you get a warranty on them and install job? I would take the car back to them as a warranty job and then take it from there.
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01-13-2017, 10:34 AM	#12
CoralRed335XI Captain 98 Rep 646 Posts Drives: 2008 E92 335XI Coupe Join Date: Aug 2011 Location: NJ,VA iTrader: (4) Garage List 2008 BMW 335XI [3.66]	Here's a quick 4th gear log which led to a half engine light when I let off the throttle. At the end of the pull, there's a requested boost of 0, but a boost PSI of 5.09: http://datazap.me/u/marcschneider/st...-7-13-16-17-23 __________________ 2008 E92 335XI, Space Gray on Coral/Fox Red Hybrid M3 seats, Premium, Cold Weather, Comfort Access, iPod. Mods: Fox Red M3 seats up front, KW V1, ER CP + TIAL BOV.
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01-13-2017, 10:47 AM	#13
ritzzzzzwik Captain 232 Rep 723 Posts Drives: SO M4 MT Join Date: Oct 2014 Location: NOVA iTrader: (0)	Boost Solenoids, or perhaps the wastegates are too tight. Might as well put stick CP, and BOV on and have BMW take a look, since they just did the turbos. __________________ 2007 335i E92 MT \| MFactory LSD \| Diff Brace \| MHD/Wedge Tuned\| BL Coils \| Stg2 lpfp BoostConcepts \| VRSF DPs \| VRSF 7" HD FMIC \| DCI \| VRSF CP \| BMW SSK \| Billstein PSS Coilovers \| M3 Control Arms \| Whiteline Rear SF Inserts \| SS brake lines \| Z4 35is Rotors \| Hawk 5.0 pads \| M219s + PSS \| PE Mod -SOLD 2016 M4 F82 MT
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03-17-2017, 12:32 AM	#14
B4LL3N Private First Class 26 Rep 156 Posts Drives: E92 N54 335xi FBO / E70 X5 N55 Join Date: Jun 2014 Location: Huntington Beach, CA iTrader: (0)	I'm getting a 3100 and 30FE, any resolution? __________________ ‘08 335Xi FBO (RWD Conversion) / PURE600 / JB4 MHD Backend / Precision RW Coils / VRSF Piping / COBB Catback / xHP / xDelete / BC Racing Coilovers / Fuel-it Stage 2 / Wagner Tuning FMIC / Turbosmart BOVs
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03-17-2017, 05:19 AM	#15
JuniorB Major 185 Rep 1,017 Posts Drives: 07 e60 525 N54 Join Date: Mar 2016 Location: Rhode Island iTrader: (0)	Check for hoses not properly tighten, or loose, and check cold side piping.
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03-18-2017, 01:08 PM	#17
SaugaSoul92 Private 4 Rep 92 Posts Drives: aw///e92 Join Date: Apr 2014 Location: Sauga iTrader: (0)	boost solenoids fixed my problem..there really easy to change..just do them both
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03-20-2017, 09:36 PM	#18
B4LL3N Private First Class 26 Rep 156 Posts Drives: E92 N54 335xi FBO / E70 X5 N55 Join Date: Jun 2014 Location: Huntington Beach, CA iTrader: (0)	Thanks, I'm beginning to think that may be where my issue is. Ordering a set.
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