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Old 07-22-2008, 03:53 PM   #1
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Still having a problem with the TD-04

So I checked the hoses today from the bypass valve and all of them are connected and are new hoses because of the turbo swap. So i'm not sure what the next step is. I just wanted to see if there is a simple fix to this before I bring it back to where I had the work done. It's still making the fluttering noise after letting off the throttle, and at certain rpms i'm getting a deep howling sound that sounds like blowing across a plastic bottle. The car also stalled on me again today twice, the rpms are just dropping down to low. Can anyone help? Thanks again.
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Old 07-22-2008, 04:24 PM   #2
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How old is your BPC? Not sure that would cause this though.

Also if you have an upgraded ECU your plugs might be done. Pull them and see what they look like. The correct ones are the NGK BCPR7ES-11 gapped to 1.0mm.
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Old 07-22-2008, 04:29 PM   #3
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It's your bypass valve. You may have it installed backwards, or else it is bad all together. I had the same problem a month ago with my Viggen. Replace your bypass valve and you're all set.

Your best bet is from eeuroparts.com for a stock replacement ($35)
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Old 07-22-2008, 04:33 PM   #4
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About that howling noise.. My dads 9-3 does that a little bit during light boost, but none of the stalling issues. It LIGHTLY flutters at higher boost. Is it time for a new one?
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Old 07-22-2008, 04:49 PM   #5
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