Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

HUGE smoke coming out of my exhuast.

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Old Jan 30, 2009 | 03:26 PM
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HUGE smoke coming out of my exhuast.

i have 2007 STI with catless turbo back and cobb stage 2. i was toying around with it the other day, slam the gas and the turbo didnt boost as well, when i got of the freeway my car was smoking bad enough to cover the whole road, but only when i gave it gas and it is down on power big time. no engine codes came up. a few people i talk to said it was the turbo and the car does have a history of shooting boost solenoid codes....but i could never figure it out. just want some advice before i drop money on a new turbo.
Old Jan 30, 2009 | 05:24 PM
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my friends car did that, combination of bad turbo and piston ring
Old Jan 30, 2009 | 05:39 PM
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^ yup if its white smoke when u gun it and idle its your turbo..... it happen to me.

if its black smoke coming out like u when old hondas and diesal throw out when they gun it, then it is your motor
Old Jan 30, 2009 | 05:46 PM
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That sucks man. Hopefully it is just the turbo.
Old Jan 31, 2009 | 11:26 AM
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I'd say no boost + smoke = Turbo
Time for an upgrade. Good luck!
Old Jan 31, 2009 | 05:39 PM
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there's a service bulletin out on cobb's website and issues that might occru while running a "catless tbe" on an 07 sti.

"Added 04/16/200 7 - A Service Bulleti n has been adde d to educate AccessPORT users
about the potential overboost issues that may occur when operating the vehicle with a
catless exhaust system".


Good luck! keep us posted

Last edited by nslow_fast_out; Jan 31, 2009 at 05:42 PM.
Old Jan 31, 2009 | 07:56 PM
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Originally Posted by GHOST STI
i have 2007 STI with catless turbo back and cobb stage 2. i was toying around with it the other day, slam the gas and the turbo didnt boost as well, when i got of the freeway my car was smoking bad enough to cover the whole road, but only when i gave it gas and it is down on power big time. no engine codes came up. a few people i talk to said it was the turbo and the car does have a history of shooting boost solenoid codes....but i could never figure it out. just want some advice before i drop money on a new turbo.

White smoke could be a bad head gasket, does the smoke have a sweet smell to it? Also a good chance that u rings are tost. The 2007 Sti a very bad engine. I hope everything works out ok for you.
Old Jan 31, 2009 | 08:03 PM
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Get a compression test. I had this happen to me before. Blown turbo and a dead #2cylinder
Old Feb 5, 2009 | 11:08 AM
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i took the turbo out and the intake side was filled with oil in it.....but i cant tell anything with out opening it up.
Old Feb 5, 2009 | 11:29 AM
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piston rings!!!!
Old Feb 5, 2009 | 11:50 AM
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what color is the smoke? even if you havent completely toasted the rings you can get blow-by under heavy load
Old Feb 5, 2009 | 12:31 PM
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the smoke is white sometime alittle blue.....horrible burn smell and turbo wont boost at all
Old Feb 5, 2009 | 12:31 PM
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oh and my motor is has 6k on it cuz its new
Old Feb 9, 2009 | 11:51 AM
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Originally Posted by GHOST STI
the smoke is white sometime alittle blue.....horrible burn smell and turbo wont boost at all
Yup I'd say your turbo be toasted.
Old Feb 10, 2009 | 12:45 PM
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thanx guys for the input, im gonna buy another turbo with my tax return and see where that gets me..



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