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Old 10-26-2019, 09:15 PM   #1
probablyslowestwrx
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Default low boost + air pump codes after clutch install

Installed a new clutch about 2 weeks ago, as soon as I started it up after the install I got two airpump codes, also on the accessport boost is now maxing out at 11 psi vs 17-18 before.

Car is a 2007 sti with a downpipe and a custom tune.

I didn't think the air pump affected boost at all, does it?
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Old 10-26-2019, 10:41 PM   #2
Haevn
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do you have a leak at the block off plates?
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Old 10-26-2019, 10:53 PM   #3
blueHulk
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It can, well at least because the barometric pressure sensor is in the secondary injection valve. Do you have any check engine light, if so what codes come up? Also using accessport, log normal driving with the barometric pressure sensor on, what are the readings? 14.7~psi is normal at sea level, if it's lower or varies, your ecu will think you are higher in elevation and cut boost.
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Old 10-27-2019, 02:18 AM   #4
probablyslowestwrx
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I didn't install any block off plates. As far as i can tell it still feels the same as before, so that theory about the barometric sensor seems pretty spot on. I think that the tuner didn't really consider mess with boost dynamic (lol) so that makes sense.
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Old 10-27-2019, 07:42 PM   #5
dryvby
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Stupid question. Was your tune just ‘flashed’ to the ecu and did you unplug the battery? If so, may want to verify the map is ‘installed’ according to the AP.
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Old 10-28-2019, 01:22 AM   #6
probablyslowestwrx
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Quote:
Originally Posted by dryvby View Post
Stupid question. Was your tune just ‘flashed’ to the ecu and did you unplug the battery? If so, may want to verify the map is ‘installed’ according to the AP.
Yeah the tune tune was flashed to the ecu. Yes the tune is in 'Installed'. I tried an OTS map from cobb and still only got 12 psi.
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Old 11-08-2019, 02:47 AM   #7
probablyslowestwrx
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Update: DAM is still at 1. Today I realized that idle vacuum is -10 when it’s normally -17. I’m thinking that there’s a leak somewhere after the throttle body since that would explain the vacuum leak, and I believe there’s a hose from the secondary air pump that connects directly to the head(s) which I might have broken in the clutch install. Any opinions?
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