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Keep on getting boost cut or misfire with anything above 20 psi

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Old Mar 1, 2018 | 07:04 AM
  #46  
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that -20 timing in the log just looks crazy and i remember back in the day some people where having issues with their clutch pedal switch false triggering NLTS. I didn't know the ecu could even pull that much timing on knock. Based on those conditions though you could just be dealing with a missfire. The ECU is better at picking up missfire at low loads then it is at WOT.

Side note, i don't know what the weather is like where you are, but MBC's are very sensitive to local conditions. So it could be 24 psi one day isn't 24 psi a month later. You would see this on the map sensor though as its referenced to absolute zero.

Last edited by Biggiesacks; Mar 1, 2018 at 07:16 AM.
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Old Mar 1, 2018 | 07:18 AM
  #47  
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Did you ever re-gap your plugs? If so what did you gap them to? Have you checked the turbo for shaft play?
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Old Mar 1, 2018 | 09:00 AM
  #48  
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Originally Posted by Biggiesacks
that -20 timing in the log just looks crazy and i remember back in the day some people where having issues with their clutch pedal switch false triggering NLTS. I didn't know the ecu could even pull that much timing on knock. Based on those conditions though you could just be dealing with a missfire. The ECU is better at picking up missfire at low loads then it is at WOT.

Side note, i don't know what the weather is like where you are, but MBC's are very sensitive to local conditions. So it could be 24 psi one day isn't 24 psi a month later. You would see this on the map sensor though as its referenced to absolute zero.
-20 timing is something that i made to the tune on low loads and rpm for that burble sound and popping sound as for mbc,isnt supposed to be observed in a log if there is any changes to the map sensor pressure?
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Old Mar 1, 2018 | 09:01 AM
  #49  
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Originally Posted by Biggiesacks
Did you ever re-gap your plugs? If so what did you gap them to? Have you checked the turbo for shaft play?
i did gap the plug to 0.022" and no didnt check the turbo shaft play yet will do tomorrow
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Old Mar 21, 2018 | 10:30 PM
  #50  
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did you ever find the problem? im having the same problem and ive replaced everything except my maf and im hoping that will solve the problem!
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Old Mar 21, 2018 | 10:52 PM
  #51  
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Originally Posted by Facker
did you ever find the problem? im having the same problem and ive replaced everything except my maf and im hoping that will solve the problem!
actually not yet didnt try yet as i was installing turbo injectors and cams lately and stuck in tuning.i'll update if i get it fixed and just update me if you sort out your issue
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Old Mar 22, 2018 | 06:02 AM
  #52  
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Originally Posted by Evo8life
Yes it might be hesitation or misfires but im not getting any codes on evoscan for it once i decrease boost on my hallmann mbc everything goes back to normal
If you look at your log closely, your WGDC start to misbehave on and around 200 load. Only thing that comes set as 200 load in the V7 rom is your "100% WGDEC Under a Certain Load" table.

Seeing you run an MBC.....

1. Set your 3D WGDC % to 100 percent across the board
2. Zero out your 2D WGDC Correction table.
3. Lower (to 100 Load or so) or zero out your "100% WGDEC Under a Certain Load" 1D table...
4. Set your boost cut to an acceptable load value.

You may only need to do step 3....
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Old Mar 22, 2018 | 01:38 PM
  #53  
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Originally Posted by 400s
If you look at your log closely, your WGDC start to misbehave on and around 200 load. Only thing that comes set as 200 load in the V7 rom is your "100% WGDEC Under a Certain Load" table.

Seeing you run an MBC.....

1. Set your 3D WGDC % to 100 percent across the board
2. Zero out your 2D WGDC Correction table.
3. Lower (to 100 Load or so) or zero out your "100% WGDEC Under a Certain Load" 1D table...
4. Set your boost cut to an acceptable load value.

You may only need to do step 3....
okey did step 3 and my boost cut is set to 320 i will lower it as for step 1 2 couldnt find which tables to adjust
and can that be my issue?
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Old Mar 22, 2018 | 01:44 PM
  #54  
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It's still the same problem as for all those other topics you started but still haven't fixed.


You've messed around with the software, changed the wrong things.
Made it go from bad to worse.


Software doesn't work on broken hardware.


In order to go forwards, you've got to take several steps backwards.

Last edited by RightSaid fred; Mar 22, 2018 at 11:51 PM.
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Old Apr 29, 2018 | 12:40 AM
  #55  
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back to update the Thread .It was the MAF sensor causing all the issues!
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Old Aug 6, 2020 | 08:11 PM
  #56  
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Originally Posted by Evo8life
back to update the Thread .It was the MAF sensor causing all the issues!
Facing with same issue, cutting boost on acceleration, Gape is 0.50. Did you clean your MAF sensor or bought new?
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Old Aug 7, 2020 | 12:07 AM
  #57  
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Originally Posted by EDDY PRIME
Facing with same issue, cutting boost on acceleration, Gape is 0.50. Did you clean your MAF sensor or bought new?
i got a used one
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Old Aug 7, 2020 | 02:10 AM
  #58  
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Shame it did not happen to have checked back on this thread, after my initial post, as it took you quite some time to find the issue. If I had , I would have seen the logs and would've seen that you had been on MAF, and not on SD as I thought you were, would have suggested checking the MAF along with the plugs as I have done numerous times in the past, mostly on MLR.






Marios
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Old Aug 8, 2020 | 02:19 AM
  #59  
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Originally Posted by Evo8life
i got a used one
So, how you actually find out that the problem was a MAF sensor? By Logs? I did a MAF clean yestrsay but did't check for result yet. Don't know will it help and don't know if the problem in MAF.
But damn stuttering on accseleration are making me crazy, Can't be confident that on a next WOT car gone well or will start cutting the boost

Last edited by EDDY PRIME; Aug 8, 2020 at 02:26 AM.
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Old Aug 8, 2020 | 02:23 AM
  #60  
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Originally Posted by EDDY PRIME
So, how you actually find out that the problem was a MAF sensor? By Logs? I did a MAF clean yestrsay but did't check for result yet. Don't know will it help and don't know if the problem in MAF.
Back then i had no experience in evos,but from experience in the symptoms which i used to see in some VAG cars which i do work on it felt the same so i went ahead and swapped the MAF and the car since then drives like new.In the logs i wasnt able to see anything wrong the logs didnt show anything abnormal in the maf reading.
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