I need help... Please,

GEO335i · 06-30-2012, 10:24 AM

my car is 335i 2008
it has Exhaust systems ,
Air Intake
jb4
and upgred tubes....

the problem Engine performance is not good .I tried to put boost on fuel the gauge shows that the Poost is very weak.
anyoen can help my bleaseeeeeeeeeeeeeee

BlueBimmer · 06-30-2012, 10:28 AM

you may have to check error codes for people to be able to help.

GEO335i · 06-30-2012, 10:45 AM

Ok i will
baut way the boost weak?
do you have idea?

gtaccord · 06-30-2012, 11:18 AM

Could be anything from a faulty recirc/blow off valve, leak in the intercooler other intake plumbing, bad turbo/s, vacuum leak, etc etc.

You really need codes and if that is not clear then a data log for people to be able to help you.

benzy89 · 06-30-2012, 12:13 PM

Assuming upgrade "tubes" = Downpipes

Not sure if you're getting misfire codes, but it's possible that the o2 sensors on the DPs were installed backwards are triggering misfires. What I mean is that the DP on bank 1 (cylinders 1-3) is hooked up to the sensor for bank 2 (cylinders 4-6), so when it tries to make corrections, it corrects the wrong banks emissions.

06-30-2012, 10:24 AM	#1
GEO335i New Member 0 Rep 11 Posts Drives: 335I Join Date: Jun 2012 Location: OMAN iTrader: (0)	I need help... Please, my car is 335i 2008 it has Exhaust systems , Air Intake jb4 and upgred tubes.... the problem Engine performance is not good .I tried to put boost on fuel the gauge shows that the Poost is very weak. anyoen can help my bleaseeeeeeeeeeeeeee
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06-30-2012, 10:28 AM	#2
BlueBimmer Enthusiast 45 Rep 278 Posts Drives: 2009 335i Convertible Join Date: Apr 2012 Location: PA iTrader: (5)	you may have to check error codes for people to be able to help.
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06-30-2012, 10:45 AM	#3
GEO335i New Member 0 Rep 11 Posts Drives: 335I Join Date: Jun 2012 Location: OMAN iTrader: (0)	Ok i will baut way the boost weak? do you have idea?
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06-30-2012, 11:18 AM	#4
gtaccord Major 56 Rep 1,464 Posts Drives: 2009 BMW 335xi Join Date: Feb 2012 Location: Maryland iTrader: (7) Garage List 2009 BMW 335i xdrive [0.00]	Could be anything from a faulty recirc/blow off valve, leak in the intercooler other intake plumbing, bad turbo/s, vacuum leak, etc etc. You really need codes and if that is not clear then a data log for people to be able to help you.
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06-30-2012, 12:13 PM	#5
benzy89 Banned 79 Rep 2,396 Posts Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ iTrader: (3) Garage List 2008 BMW 335i [7.50]	Assuming upgrade "tubes" = Downpipes Not sure if you're getting misfire codes, but it's possible that the o2 sensors on the DPs were installed backwards are triggering misfires. What I mean is that the DP on bank 1 (cylinders 1-3) is hooked up to the sensor for bank 2 (cylinders 4-6), so when it tries to make corrections, it corrects the wrong banks emissions.
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