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Author Topic: Boost Issue  (Read 27972 times)
nyet
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« Reply #15 on: March 05, 2013, 05:47:31 PM »

Yes, if you are in limp it would stay at cracking pressure, unless you have a bad wg line or n75
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vdubnation
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« Reply #16 on: March 05, 2013, 05:50:46 PM »

crazy traffic out tonight this is the best i could do on my own
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airtite
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« Reply #17 on: March 05, 2013, 10:10:18 PM »

something seriously wrong, your actual is always way above requested and n75 duty is sitting 0% from 4000rpm onwards so you are going going into soft limp with a positive deviation. I had a friend car who did something similar and whoever worked on his car before had the wastegate pretty much tightened shut.

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airtite
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« Reply #18 on: March 05, 2013, 10:34:55 PM »

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vdubnation
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« Reply #19 on: March 06, 2013, 06:59:33 PM »

crazy good progress today check out this log
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airtite
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« Reply #20 on: March 06, 2013, 10:50:00 PM »

it is better but you are having similar issues to what I am having on my new setup where boost spikes at 3000rpm then your throttle closes to 30percent  and wgdc is going to 0% but your boost still remains above specified boost. I am still not a 100percent sure if mine is wastegate actuator related or not but you seem to have easier access to yours which seems to have helped bring your boost closer inline so maybe try and loosen the actuator 1 or 2 more turns and lets see whats happens.
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airtite
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« Reply #21 on: March 06, 2013, 10:53:34 PM »

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ddillenger
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« Reply #22 on: March 06, 2013, 10:56:24 PM »

Read this Mickey.

http://s4wiki.com/wiki/Throttle_cut

What's your wastegate cracking pressure? Has the turbo ever been replaced? Looks like someone has it cranked down.
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airtite
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« Reply #23 on: March 06, 2013, 11:05:08 PM »

Read this Mickey.

http://s4wiki.com/wiki/Throttle_cut

What's your wastegate cracking pressure? Has the turbo ever been replaced? Looks like someone has it cranked down.

I asked him to readjust the actuator yesterday which is what brought the boost down from the first log
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nyet
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« Reply #24 on: March 07, 2013, 10:30:01 AM »

I asked him to readjust the actuator yesterday which is what brought the boost down from the first log

Well, its still fucked Smiley
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ddillenger
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« Reply #25 on: March 07, 2013, 10:31:22 AM »

Well, its still fucked Smiley

My thinking exactly. What's factory preload?
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airtite
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« Reply #26 on: March 07, 2013, 10:59:31 AM »

Well, its still fucked Smiley

not as fucked as it was  Grin
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vdubnation
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« Reply #27 on: March 07, 2013, 11:00:50 AM »

Unplugged the n75 it looks like I am at around 9 psi wg
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nyet
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« Reply #28 on: March 07, 2013, 11:02:10 AM »

Unplugged the n75 it looks like I am at around 9 psi wg



that doesn't look like 9psi

that looks like a torn WG or busted n75
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ddillenger
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« Reply #29 on: March 07, 2013, 11:03:45 AM »

Looks like 17 to me.
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