Can't hold boost.

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Dusty B
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Can't hold boost.

Post by Dusty B »

Search function enabled, not too much info related to my issue at hand.

Scenario: (91 t-leg) Finally finished installed my apexi s-afc, and greddy e-01 boost controller last night (left over from my wrx). I am de-snorked, awaiting my 06 intercooler, so I was just trying to go to 10psi. Start dialing everything in, adjust my idle, make sure I'm safe with the s-afc. Go out for a test drive, boost will spike around 9.5psi and then just drop off to wastegate pressure, meanwhile the greddy bcs is reading 100% duty cycle, with no change in boost. I think the car may have been doing this before the attempted adding of boost, however I just don't think it was as noticeable with lower boost levels. I'm going to put a vacuum pump on the wastegate to see if it holds any vacuum, I think I may have a problem with the diaphram. Anyone else have any similar experiences?

Also I was wondering if anyone else has been running/has run the apexi s-afc on thier t-leg, I would like to talk to you about your results!

Thanks for reading!
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Dusty B
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Post by Dusty B »

Update, left a vacuum pump on the wastegate actuator yesterday, it's holding fine... I'm suspecting the boost controller itself is at fault now since I've been through everything else. Going to swap in a manual bc and see if she'll hold it.
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Dusty B
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Post by Dusty B »

Just got off the phone with greddy.... They are trying to convince me the vf11 is too small/responsive to control boost properly... I don't know whether or not to call bs on this.
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Legacy777
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Post by Legacy777 »

Why did you switch to the greddy boost control solenoid? The stock solenoid does essentially the same thing.

Does Greddy unit have its own controller?
Josh

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1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

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Dusty B
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Post by Dusty B »

Yes the greddy unit has its own control unit, lcd screen, solenoid, and remote. It used to be greddy's whoop-ass controller that interfaced with the emanage when it was still being made (the e-01 that is). I have already installed a hallman mbc, and am just going to get rid of the e-01. For anyone curious, link to the e-01 on greddys site:


http://www.greddy.com/products/display/ ... ategory=51
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