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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 06-25-2008, 05:30 PM   #1
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Unhappy New Vac lines=boost cut

I replace vac line from BOV to Throttle and all the ones on the BPC to the turbo
and in a 65-90mph in 5th full throttle i hit boost cut. Do need a new waste gate

I even zipped tide them and and still happens.

on the goods side the car holds a gain of 2 psi and spike to 21-22 it used to spike to 18 and hold 16
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Old 06-25-2008, 07:42 PM   #2
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Maybe the BPV is bad? Do you have another to test it?
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Old 06-25-2008, 07:46 PM   #3
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yea i should try that
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Old 06-26-2008, 03:18 AM   #4
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Are you sure you got them all hooked back up in the right places?
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Old 06-26-2008, 03:28 AM   #5
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^^ that would be my guess too.

you might have put the lines for the wg and comp housing backwards...
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Old 06-26-2008, 07:34 AM   #6
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Quote:
Originally Posted by mcrowley View Post
Are you sure you got them all hooked back up in the right places?
only removed one at a time
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Old 06-26-2008, 07:37 AM   #7
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only removed one at a time
I;ve heard that line and still seen people do it wrong.

New vac lines are not going to cause problems, however you might have had an existing problem that for some reason was not apparent with the old vac lines...

Other than that, no idea.
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Old 06-26-2008, 07:46 AM   #8
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How old is the BPC
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Old 06-26-2008, 08:50 AM   #9
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If you are unable to figure this out, I will be the first to recommend NIRA, Holset, and/or Megasquirt as simple, viable options for solving this problem. Then again, you probably already knew that.
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Old 06-26-2008, 09:27 AM   #10
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Quote:
Originally Posted by LeGiT SaaB View Post
How old is the BPC
it was on the car when i bought it so i assume it the same it was on the car when it rolled off the line
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Old 06-26-2008, 09:28 AM   #11
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If you are unable to figure this out, I will be the first to recommend NIRA, Holset, and/or Megasquirt as simple, viable options for solving this problem. Then again, you probably already knew that.
wrong car
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Old 06-26-2008, 12:27 PM   #12
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If your old vac lines were leaking Trionic would have positively adapted boost, when you fixed leak the adation is out.
Try reset the ecu and do an adaption run
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Old 06-26-2008, 10:25 PM   #13
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i need a new di My Good one took a Dump ( Hits head on wall) One day after having more boost
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