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MBC and n75 valve causing limp mode...

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Old 06-29-2006, 02:09 PM
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Default MBC and n75 valve causing limp mode...
<center><img src="http://pictureposter.audiworld.com/103335/mbc.jpg"></center><p>i recently installed a MBC in place of my n75 valve.. but i left the n75 valve pluged in electronicaly and with the ambient hose..
like in this pic.. but i keep adjusting the MBC and only getting 5 psi.. TIA
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Old 06-29-2006, 02:14 PM
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what chip? KO3s, KO4s? TCD also? More info...TIA.
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Old 06-29-2006, 02:30 PM
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GIAC x k03's no tcd..
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Old 06-29-2006, 02:39 PM
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what are you trying to do with the MBC alone? why?
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Old 06-29-2006, 02:41 PM
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Default you ordered the standalone mbc, not the parallel one, right?
and why are you running mbc only on k03's?
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Old 06-29-2006, 02:43 PM
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yea standalone.. cause i want k04's..
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Old 06-29-2006, 02:44 PM
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set mbc at 18 psi and taper to 12.5.... because i can..
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Old 06-29-2006, 03:02 PM
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Default In the ECU if requested boost doesn't come close to actual boost you will go into limp mode.
Thats why you need a TCD when running a MBC with the n75 disconnected. It lies to the ECU about the actual boost, so the ECU thinks it is getting what it requests.
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Old 06-29-2006, 03:05 PM
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ok thank you.. but my n75 is connected but not on the hoses.. but it stil will do it ?
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Old 06-29-2006, 03:10 PM
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IMO, get a parallel set up, and a TCD. Just an MBC will only give you problems.
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