Boost issues

Slow_2.5 · 10-18-2012, 05:42 PM

Alright guys I need some help. I am having issues with achieving boost in 1st and 2nd gears. The car is a 06 wrx with a VF22. In 1st gear at WOT I can only get ~10psi max where normally I can get 15 out of it. In 2nd gear I can only get it up to ~16psi where normally it will get to full boost which is 22psi. In 3rd - 5th it will hit full boost but it spools like a 40r. I just replaced the pre turbo exhaust gaskets as they were all leaking a bit but this did nothing. Any help would be greatly appreciated.

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Slow_2.5 · 10-18-2012, 05:44 PM

Also the turbo has ~20k on it and is not exhibiting the normal dentist drill signs of a bad turbo.

holyjoetart · 10-18-2012, 06:38 PM

Plugged air filter?
Vacuum leak?
BPV leak?
Waste gate sticking open?

RatedR · 10-18-2012, 06:56 PM

I did this smoke test I saw on youtube where the guy uses a cigar and blows into one of the vacuum lines on the intake pipe. He then looks for where the smoke is coming out of. I found a leak on my inlet pipe, small, but enough to throw off the ECU to go into safe mode.

guygettnby · 10-18-2012, 08:50 PM

Quote:

Originally Posted by RatedR

I did this smoke test I saw on youtube where the guy uses a cigar and blows into one of the vacuum lines on the intake pipe. He then looks for where the smoke is coming out of. I found a leak on my inlet pipe, small, but enough to throw off the ECU to go into safe mode.

Where was the leak out of curiosity? Were you knocking at all?

Slow_2.5 · 10-18-2012, 10:00 PM

Thanks for the help guys. I will get probing in the AM. how do you check to see if the wastegate is stuck open?

RatedR · 10-25-2012, 03:47 PM

Right by the sleeve of the inlet pipe that covers the turbo. If the clamp moves, it sucks in air and has the car run lean. I got a used AVO extended inlet pipe, solved the torque loss problem.

PS - I dont smoke tobacco, stay HERBAL!

Quote:

Originally Posted by guygettnby

Where was the leak out of curiosity? Were you knocking at all?

RatedR · 10-30-2012, 01:26 PM

Here's a pic of my wife's sti's inlet pipe

This tiny hole made that boost fluctuation....i guess whenever it inched of the clamp.

10-18-2012, 05:42 PM	#1
Slow_2.5 Scooby Newbie Member#: 292104 Join Date: Aug 2011 Chapter/Region: NESIC Location: El Paso TX Vehicle: 2006 Jawny jawn Burple	Boost issues Alright guys I need some help. I am having issues with achieving boost in 1st and 2nd gears. The car is a 06 wrx with a VF22. In 1st gear at WOT I can only get ~10psi max where normally I can get 15 out of it. In 2nd gear I can only get it up to ~16psi where normally it will get to full boost which is 22psi. In 3rd - 5th it will hit full boost but it spools like a 40r. I just replaced the pre turbo exhaust gaskets as they were all leaking a bit but this did nothing. Any help would be greatly appreciated. * Registered users of the site do not see these ads.

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10-18-2012, 05:44 PM	#2
Slow_2.5 Scooby Newbie Member#: 292104 Join Date: Aug 2011 Chapter/Region: NESIC Location: El Paso TX Vehicle: 2006 Jawny jawn Burple	Also the turbo has ~20k on it and is not exhibiting the normal dentist drill signs of a bad turbo.

10-18-2012, 06:38 PM	#3
holyjoetart Scooby Newbie Member#: 232986 Join Date: Dec 2009 Location: Rock Springs, WY Vehicle: 07 Legacy GT OBP	Plugged air filter? Vacuum leak? BPV leak? Waste gate sticking open?

10-18-2012, 06:56 PM	#4
RatedR Scooby Newbie Member#: 140974 Join Date: Feb 2007	I did this smoke test I saw on youtube where the guy uses a cigar and blows into one of the vacuum lines on the intake pipe. He then looks for where the smoke is coming out of. I found a leak on my inlet pipe, small, but enough to throw off the ECU to go into safe mode.

10-18-2012, 10:00 PM	#6
Slow_2.5 Scooby Newbie Member#: 292104 Join Date: Aug 2011 Chapter/Region: NESIC Location: El Paso TX Vehicle: 2006 Jawny jawn Burple	Thanks for the help guys. I will get probing in the AM. how do you check to see if the wastegate is stuck open?

10-30-2012, 01:26 PM	#8
RatedR Scooby Newbie Member#: 140974 Join Date: Feb 2007	Here's a pic of my wife's sti's inlet pipe This tiny hole made that boost fluctuation....i guess whenever it inched of the clamp.