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

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Old Jan 7, 2018, 11:58 AM   #1
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Keep on getting boost cut or misfire with anything above 20 psi

Hi guys anyone has any idea about this if i increase boost for anything above 20 psi i start getting heavy boost cut what can cause such an isssue my plugs are almost new as for coils and wires any idea about this
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Old Jan 7, 2018, 02:06 PM   #2
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What's your AFR like?
Was the car tuned?

Need more information or post a log.
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Old Jan 7, 2018, 03:41 PM   #3
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I can post a log tomorrow i will be doing wot pulls on 19 and more psi to see whats different
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Old Jan 10, 2018, 02:15 AM   #4
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In Beirut you guys have some good evo shops.
Also, you should consider checking the gap on your plugs. And which plugs did you install? oem?
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Old Jan 10, 2018, 02:40 AM   #5
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You got that log? I liked to see where you are at before I give advice. More info please.
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Old Jan 10, 2018, 03:19 AM   #6
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Quote:
Originally Posted by Evo9_Dubai View Post
In Beirut you guys have some good evo shops.
Also, you should consider checking the gap on your plugs. And which plugs did you install? oem?
im a Vw audi technician and thats my own car so i wanna fix it without seeking help from evl shops and im having trouble logging afr i bought a d sub232 yesterday i think today at night in gonna be ready and pull the trigger on a log
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Old Jan 10, 2018, 03:21 AM   #7
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You got that log? I liked to see where you are at before I give advice. More info please.
most probably tonight i had problems with setting omni 4 bar and afr to evoscan which i think i fixed
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Old Jan 10, 2018, 04:14 AM   #8
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Originally Posted by Evo9_Dubai View Post
In Beirut you guys have some good evo shops.
Also, you should consider checking the gap on your plugs. And which plugs did you install? oem?
my plugs were installed by a shop 1.5k miles ago when i bought the car so no idea what they are i can take them out to see and i have a set of ngk bpr8 brsnd new that i bought from maperformance bit didnt installed my plugs were not GAPPED they just installed them i can send my timing and fuel maps if you want
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Old Jan 10, 2018, 06:05 AM   #9
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Are you positive it is boost cut, or is it heavy hesitation/misfire?








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Old Jan 10, 2018, 08:05 AM   #10
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Originally Posted by Evo8cy View Post
Are you positive it is boost cut, or is it heavy hesitation/misfire?








Marios
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
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Old Jan 10, 2018, 08:15 AM   #11
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Pull the spark plugs and inspect them, see if they've got any oil residue on them. Put the new ones in, gap them to 0.55mm. Next time use ngk br7es gapped to 0.55mm and you should be fine with power and boost you are running.


There are those times that one should rely on shear experience and knowledge instead of obd2. You do not always get misfire codes with evoscan.









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Old Jan 10, 2018, 11:45 AM   #12
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could not log afr yet as the serial port is not attached I had a fuel cut in the highest boost run were hitting the gas did absolutely nothing so took my foot off then went wot again and car pulled I can post my fuel and timing table also if that's helpfull
Attached Files
File Type: csv EvoScanDataLog_2018.01.10_20.00.39.csv (66.9 KB, 0 views)
File Type: csv EvoScanDataLog_2018.01.10_19.59.39.csv (46.7 KB, 0 views)
File Type: csv EvoScanDataLog_2018.01.10_19.57.31.csv (61.7 KB, 0 views)
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Old Jan 10, 2018, 11:49 AM   #13
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thank you man for helping In all my questions I will gap the new plugs tomorrow and put them in and see if that helps but actually I don't think that's the problem but will try it anyway
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Old Jan 11, 2018, 01:59 PM   #14
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new logs with afr uploaded but car did not want to cut or hesitate I reached 24 psi and car was going without encountering anything at all but im seeing recently a rich idle that goes down all the way to 11.2 sometimes its not stable anymore my idle is always falling into 12.5 and lower
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Old Jan 12, 2018, 04:28 AM   #15
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Quote:
Originally Posted by cming21 View Post
You got that log? I liked to see where you are at before I give advice. More info please.
logs attached
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