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Old 08-09-2003, 02:57 PM   #1
03WRX83
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Join Date: Nov 2002
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0394 WRX/Supra
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Default slow/low boost with downpipe install

I just got done installing a bosal twin dump downpipe and a 2.5'' catback exhaust.


I have a AccessECU stage 1 Reflash and an uppipe.


I am experience low and very very slow rising boost. I max boost around 11-10psi. When i first test drove the car the boost acted normal, but once i got on it, it seems like the computer limited my boost.

Could this be because of the Stage 1 reflash, causing the boost limiting?

I want to try and put my mbc on and see if i get normal boost capibilities with that, then i should know if its the ecu.


Please respond.
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Old 08-09-2003, 06:56 PM   #2
esteve
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I would send your ecu back to Cobb ASAP for the stage 2 reflash and give them a call about this.

I read about some problems with certain Bosal DPs where the splitter went into the turbo housing too far and messed with the wastegate's operation. I guess you could check it by manually opening/closing it and feeling for anything not right.

I would think it's your mismatched combo causing this problem but a lot of people have put TBEs on stock ecu's with none of the boost problems you have. Maybe with the stage 1 it's different.
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Old 08-09-2003, 06:59 PM   #3
03WRX83
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i can achieve boost with the operation of the mbc that i put on.. but if i hit full boost and keep it there it seems the computer then limits it..


but just driving easy 0-7psi and such boost works great.


so i dont think its the dp.
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Old 08-09-2003, 08:51 PM   #4
Barry
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left you a link in your other post........
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Old 08-10-2003, 01:14 PM   #5
03WRX83
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barry how come i can get boost with the mbc though?
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