335i turbo issue

Noobieforlife335 · 10-01-2013, 08:33 PM

I have a 2007 335i with cobb tune, it is making a, id like to say loud squealing type noise under full boost, 14 psi with cobb. It is not the boost noise. mechanic is saying he wants to replace to my turbo but I am highly doubtful its the turbo.

I dont have excel on this computer so i cant post the logs, i can post data if need be, but when you view the logs it shows under normal boost a normal graph, when running extra boost on cobb it shows the fueling and boost kind of an up and down spike all the way through the graph, going up down up down. It throws a 30fe in third gear around 100, and throws dtml fine leak and fuel pump plausibility on the occasional start up. btw the noise seems to come from the front right area of the hood.

Anybody experienced the same symptoms? Or have any idea what is making that noise and causing the boost and fueling to spike and drop like that? Any help is greatly appreciated.

gzim335 · 10-01-2013, 09:18 PM

no log no help lol
u prob have a boost leak, check vacuume lines too

E90_boostjunky · 10-01-2013, 09:18 PM

Could be a lot of things. How many miles do you have? Any other engine mods.

Noobieforlife335 · 10-01-2013, 10:11 PM

theres just a dci, and a vsrf catback exhaust. 93k miles

Mardio · 10-01-2013, 10:30 PM

Hard to say without the log.

Noobieforlife335 · 10-01-2013, 10:43 PM

I will have logs posted either later tonight or tommorow

Noobieforlife335 · 10-03-2013, 03:58 PM

okay for some reason this wont let me attach the csv files. so im just going to link my n54tech post with all the csv files posted if anyone is willing to take a gander.

http://www.n54tech.com/forums/showthread.php?p=278215

blaster3500 · 10-04-2013, 08:47 AM

Check out www.datazap.me Upload your logs then post the link

Noobieforlife335 · 10-04-2013, 03:07 PM

http://www.datazap.me/u/bodes88/cobb...oblem?1-5-8-20

Jeff@TopGearSolutions · 10-04-2013, 03:29 PM

Loud squealing noise underboost? Probably a boost leak.

If it sounds more mechanical then air then it very well could be a mechanical problem I.E. turbo.

You are only making 9 PSI at 6000 RPM. You are not meeting any requested load or anything.

Start checking for leaks. Pre intercooler. Post intercooler and Vac lines.

Noobieforlife335 · 10-08-2013, 04:09 PM

They just got done with the smoke test.
They claimed that everything was just fine except a tiny leak pre turbo.

Noobieforlife335 · 10-08-2013, 06:03 PM

http://www.datazap.me/u/bodes88/cobb...lem-2?1-3-8-20
heres a log i just made today just to make sure,
the cobb ap read today "pre control boost control pressure to leak from pressure line

10-01-2013, 08:33 PM	#1
Noobieforlife335 New Member 0 Rep 28 Posts Drives: e90 335i Join Date: Jun 2013 Location: seattle iTrader: (0) Garage List 2007 bmw 335i [8.00]	335i turbo issue I have a 2007 335i with cobb tune, it is making a, id like to say loud squealing type noise under full boost, 14 psi with cobb. It is not the boost noise. mechanic is saying he wants to replace to my turbo but I am highly doubtful its the turbo. I dont have excel on this computer so i cant post the logs, i can post data if need be, but when you view the logs it shows under normal boost a normal graph, when running extra boost on cobb it shows the fueling and boost kind of an up and down spike all the way through the graph, going up down up down. It throws a 30fe in third gear around 100, and throws dtml fine leak and fuel pump plausibility on the occasional start up. btw the noise seems to come from the front right area of the hood. Anybody experienced the same symptoms? Or have any idea what is making that noise and causing the boost and fueling to spike and drop like that? Any help is greatly appreciated.
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10-01-2013, 09:18 PM	#2
gzim335 Captain 148 Rep 965 Posts Drives: e92 m3 Join Date: Feb 2011 Location: staten island ny iTrader: (4) Garage List 2007/1 e90 335i [2.00]	no log no help lol u prob have a boost leak, check vacuume lines too __________________ e92 m3 dct gintani stage 2+ full ethanol custom pulley and meth kw clubsport,ap racing radical,volk te37sl,akrapovic rear,recaro profi xl,voltphreaks battery
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10-01-2013, 09:18 PM	#3
E90_boostjunky Lieutenant Colonel 93 Rep 1,644 Posts Drives: BMW 335I E90 SGM Join Date: Dec 2011 Location: USA, IL iTrader: (1)	Could be a lot of things. How many miles do you have? Any other engine mods.
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10-01-2013, 10:11 PM	#4
Noobieforlife335 New Member 0 Rep 28 Posts Drives: e90 335i Join Date: Jun 2013 Location: seattle iTrader: (0) Garage List 2007 bmw 335i [8.00]	theres just a dci, and a vsrf catback exhaust. 93k miles
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10-01-2013, 10:30 PM	#5
Mardio Brigadier General 197 Rep 3,211 Posts Drives: 2017 X5 Join Date: Jun 2006 Location: Nashville iTrader: (0)	Hard to say without the log.
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10-01-2013, 10:43 PM	#6
Noobieforlife335 New Member 0 Rep 28 Posts Drives: e90 335i Join Date: Jun 2013 Location: seattle iTrader: (0) Garage List 2007 bmw 335i [8.00]	I will have logs posted either later tonight or tommorow
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10-03-2013, 03:58 PM	#7
Noobieforlife335 New Member 0 Rep 28 Posts Drives: e90 335i Join Date: Jun 2013 Location: seattle iTrader: (0) Garage List 2007 bmw 335i [8.00]	okay for some reason this wont let me attach the csv files. so im just going to link my n54tech post with all the csv files posted if anyone is willing to take a gander. http://www.n54tech.com/forums/showthread.php?p=278215
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10-04-2013, 08:47 AM	#8
blaster3500 Lieutenant 143 Rep 567 Posts Drives: 07 E90 335i Join Date: Aug 2010 Location: Seneca, SC iTrader: (7)	Check out www.datazap.me Upload your logs then post the link __________________ 07 335 6MT
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10-04-2013, 03:07 PM	#9
Noobieforlife335 New Member 0 Rep 28 Posts Drives: e90 335i Join Date: Jun 2013 Location: seattle iTrader: (0) Garage List 2007 bmw 335i [8.00]	http://www.datazap.me/u/bodes88/cobb...oblem?1-5-8-20
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10-04-2013, 03:29 PM	#10
Jeff@TopGearSolutions 3441 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Loud squealing noise underboost? Probably a boost leak. If it sounds more mechanical then air then it very well could be a mechanical problem I.E. turbo. You are only making 9 PSI at 6000 RPM. You are not meeting any requested load or anything. Start checking for leaks. Pre intercooler. Post intercooler and Vac lines.
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10-08-2013, 04:09 PM	#11
Noobieforlife335 New Member 0 Rep 28 Posts Drives: e90 335i Join Date: Jun 2013 Location: seattle iTrader: (0) Garage List 2007 bmw 335i [8.00]	They just got done with the smoke test. They claimed that everything was just fine except a tiny leak pre turbo.
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10-08-2013, 06:03 PM	#12
Noobieforlife335 New Member 0 Rep 28 Posts Drives: e90 335i Join Date: Jun 2013 Location: seattle iTrader: (0) Garage List 2007 bmw 335i [8.00]	http://www.datazap.me/u/bodes88/cobb...lem-2?1-3-8-20 heres a log i just made today just to make sure, the cobb ap read today "pre control boost control pressure to leak from pressure line
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