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*FIXED* 2000 s4 boost help *FIXED*

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Old May 20, 2008 | 04:42 PM
  #11  
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Default RE: 2000 s4 boost help...now a REWARD

what actions does the car make when you give it throttle..

it sounds like it could be in limp mode...

which could stem from a bad 02 sensor or maf issue...
 
Old May 20, 2008 | 05:07 PM
  #12  
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Default RE: 2000 s4 boost help...now a REWARD

Will the ECU tell you if you have a bad o2 sensor?
 
Old May 20, 2008 | 09:06 PM
  #13  
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Default RE: 2000 s4 boost help...now a REWARD

ORIGINAL: sooks

what actions does the car make when you give it throttle..

it sounds like it could be in limp mode...

which could stem from a bad 02 sensor or maf issue...

When you give it throttle it acts normal. Simply doesnt boost anymore than 5-6 lbs. Both turbos have been confirmed to be in good working order, with no noises or oil leaks.
 
Old May 21, 2008 | 12:17 AM
  #14  
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Default RE: 2000 s4 boost help...now a REWARD

im going with youre in limp mode...
 
Old May 21, 2008 | 07:51 AM
  #15  
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I have an OBD2 scanner. Im not pulling any codes. I also broke down and took the car to the dealer. The car was not in Limp mode and im still not getting any codes with my scanner
 
Old May 21, 2008 | 09:19 AM
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Default RE: 2000 s4 boost help...now a REWARD

My assumption is the Wastegates are opening early. Im sure this is ecu driven...so what would the ecu use as reference to open the wastegates premature. what component failure.
Again...i have 2 intermittent bad exgaust gas temp sensors. Could that cause the computer to pull boost?
 
Old May 21, 2008 | 09:58 AM
  #17  
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A responseon vortex confirmed that the EGT sensors would in fact result in a loss of boost. Im going to change em.
 
Old May 21, 2008 | 12:05 PM
  #18  
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Default RE: 2000 s4 boost help...now a REWARD

Does your car run anything less than 6lbs, if you beat on it or run it hard for a min?

My boost gauge reads in kPa and is digital. With my car in retard modethe boost is at .6kPa (should be 1.25kPa) and whenever i run it hard for a min it cuts it in half (.3kPa) I think thats is a result in the EGT going up so the ECU is pulling the boost due to a bad EGT sensor.

Your car isn't doing that though. Just qurious. I dont want you to spend$600.00 if thats not it. But this is still a theory.
 
Old May 21, 2008 | 04:29 PM
  #19  
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Default RE: 2000 s4 boost help...now a REWARD

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Does your car run anything less than 6lbs, if you beat on it or run it hard for a min?

My boost gauge reads in kPa and is digital. With my car in retard modethe boost is at .6kPa (should be 1.25kPa) and whenever i run it hard for a min it cuts it in half (.3kPa) I think thats is a result in the EGT going up so the ECU is pulling the boost due to a bad EGT sensor.

Your car isn't doing that though. Just qurious. I dont want you to spend$600.00 if thats not it. But this is still a theory.
At full throttle the boost spikes to 6 lbs. than levels off at 5. the car isnt in limp mode and runs...well...pretty normal. The intermittent temp readings the dealer got were like, 1030 degrees. but he did say it was an intermittent failure. So im assuming that those faulty egt's would at some point be correct and i would have full boost. I still havent seen any boost over 5-6 lbs.
I have found a place i can purchase both of them for 300 shipped but, they have 60k on them and i a little concerned about that.
 
Old May 21, 2008 | 05:20 PM
  #20  
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Default RE: 2000 s4 boost help...now a REWARD

well my friend works at audi and she is getting me a price on two of them (dealer cost) so let me find out how much and if you want some ill see what i can do.
 



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