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Old 10-22-2002, 01:38 AM   #1
brazymstrp
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Member#: 18860
Join Date: May 2002
Location: Los Angeles
Vehicle:
2002 WRX Wagon
WR Blue

Question Boost problem...did i fry my stock boost controller

okay, i felt like beind adventurous and made my own boost controller. After hitting the fuel cut off or boost cut off (not sure what to call it) I decided to put the hoses back to use the stock boost controller. I seemed to misplace the "T" that i needed, so i just bought a typical 3/16" T. That made me get boost at around .5 or .05 MPA.

I remembered reading that the factory tee had a restrictor built in. So what i did was buy a 3/16" restrictor and install it between the compressor, and the "T". That made boost ridiculously unstable. It seemed as if it were about to hit cut off, then it would back down do .5 mpa.

That scared me, so i decided to look thouroghly for the stock T. I found it, connected it back up, and i got a max boost of .5 mpa. I thought that i may have installed it incorrectly, so i flipped the T around and connected it. Still no dice. I replaced all the hoses with some 3/16" vaccum hose that i bought at the local autozone to see if maybe a hose was broken, still no dice.

I even went and tee'd off the BOV line, and connected that to the T, while capping off the turbo compressor connector.

what do you guys think? Is my car just in this so called "limp mode" and just have to reset the ECU or did i fry the stock solenoid? Any help or thoughts would be greatly appreciated. If not, i guess i'm going to have to put back the MBC i made, and just watch out for that PTFB...and wait untill i can afford a EBC. Thanks

-Jack
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Old 10-22-2002, 03:00 AM   #2
khart2
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I had a MBC on my car for about 6 months then went back to stock and had the same problem, never did figure it out. I had sold the MBC I had so I went out and got a GFB MBC from Vivid Racing for $50 until I had the money for an EBC.
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Old 10-22-2002, 03:31 AM   #3
jlevy
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do you still have the small brass restrictor in the hose that comes off the compressor?
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Old 10-22-2002, 04:01 AM   #4
khart2
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I originally reinstalled all the stock stuff the way it was, but have since tossed it all because it didn't work anyhow. I now have a Blitz Dual SBC Spec-S EBC which works great.
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Old 10-22-2002, 07:47 AM   #5
VetteVert
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Quote:
Originally posted by jlevy
do you still have the small brass restrictor in the hose that comes off the compressor?
^
||
||
||

Ditto. Go back to all stock hoses, and make sure the hose with the small brass restrictor inside the hose goes from the compressor outlet to the factory Tee. Squeeze the hose to find the restrictor. This seems to be the problem 90% of the time.

VV
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Old 10-22-2002, 01:48 PM   #6
brazymstrp
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man, i didn't even know that the hose had the restrictor, i always thought it was the T itself. Hmm, maybe i'll go pass by the dealer and go see if they have the part. Man, do I feel stupid for throwing away the hose. Or hey, maybe one of you guys would be willing to sell me your hose . Just a thought. Thanks for the help guys. At least now I know what's wrong. Thanks again

-jack
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Old 11-30-2004, 05:26 AM   #7
17cTSi
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i am germany right now and have the same damn problem, how would i go about getting another line with a restrictor. Becaust the german dealer mechanic is satisfiedd with telling my gauge just is reading wrong. Does anybdy have a part number.
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Old 11-30-2004, 02:14 PM   #8
Russ77
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http://www.subaruparts.com/diag/?mod...category=073-1
and
http://www.subaruparts.com/diag/?mod...category=081-1

these links should get you all the part numbers you need to put everything back to stock.
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