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WTF is up with my boost curve?

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Old 06-28-2005, 06:00 PM
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Default WTF is up with my boost curve?

K04 w/neuspeed software, forge 007 DV w/blue spring.
slow ramp up indicates a boost leak methinks, but WTF is going on > 5250 RPM?
<img src="http://pictureposter.audiworld.com/52813/boost.2.jpg">

I know I need to do some additional logging still
Old 06-28-2005, 06:06 PM
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Engine running out of fuel in the upper end and the timing sputtering out?
Old 06-28-2005, 08:50 PM
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It's your software
Old 06-28-2005, 09:09 PM
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is your car heat soaked?
Old 06-29-2005, 03:15 AM
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not at that point
Old 06-29-2005, 03:16 AM
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then why has it only been doing this recently when I've been running the software for a year?
Old 06-29-2005, 03:21 AM
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Default after reading the post below I had a revelation...

it's my fuel pump/filter. I've been hearing a slight whining coming from under the back seat area. If the fuel pump is straining and not delivering the requested fuel, that could certainly cause the irregular boost, right?
Old 06-29-2005, 03:55 AM
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Default yeah you'd also throw bank 1 lean codes

go log the air fuel rate and CF/KNOCK VOLT.

looks like surging to me, maybe you do have a boost leak causing the turbo to spin faster than it is to produce the requested boost.
Old 06-29-2005, 04:19 AM
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I hate boost leaks, so hard to track down
Old 06-29-2005, 04:55 AM
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hey matt, are you still running the n75j?


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