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Thread: Sr20det missing under boost

  1. #1
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    Sr20det missing under boost

    Hi i have been googling and asking seniors but couldn't find a solution . I am actually driving a s15 spec r on power fc and regular works on it but i am having issue for a time which was not earlier that is when i am on apex of boost my car just start bogging and missing and give engine check light and hearing air compressor of turbo more vividly .
    1. First my bov came up faulty when i was checking boost leakage (corrected by changing )
    2.secondly cleaned the z33 maf
    3.coil pack came faulty and changed it with oem but used and good to go
    4.opened the turbo and cleaned and all good to go
    5. Checked the coil plugs all good in condition greyish and black because car is bit lean after all this
    ...After all this , car is stilling missing under boost ...
    So please share your experiences weather its spitfire Coilspacks needed , new fuel pump needed or new coils plug needed



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  2. #2
    I <3 BBS LM Actual_Ben_Taylor's Avatar
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    What bhp level are you running at?

    Usually it's just the spark plugs, they can look fine but still cause a miss

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    Quote Originally Posted by Actual_Ben_Taylor View Post
    What bhp level are you running at?

    Usually it's just the spark plugs, they can look fine but still cause a miss




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    Quote Originally Posted by Actual_Ben_Taylor View Post
    What bhp level are you running at?

    Usually it's just the spark plugs, they can look fine but still cause a miss
    Yea i am on 330hp and yes this might be the cause because my spark plugs looks good but i am using it for a long time .. tomorrow i will change the plugs early ..


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    I <3 BBS LM Actual_Ben_Taylor's Avatar
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    Quote Originally Posted by sair View Post
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    Check engine light with PowerFC is either knock, injector duty or airflow meter

    check these first, if you're running Z33 (not Z32) MAF it's probably that actually
    Last edited by Actual_Ben_Taylor; 12-04-2017 at 22:12.

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    Quote Originally Posted by Actual_Ben_Taylor View Post
    Indeed

    Check engine light with PowerFC is either knock, injector duty or airflow meter

    check these first, if you're running Z33 (not Z32) MAF it;s probably that actually
    Sorry bro that was wrong type text thats z32 maf ... check engine only come when its on peak of boost that is missing at the moment and knock is only 6 or 8 all other perfect .


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    I <3 BBS LM Actual_Ben_Taylor's Avatar
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    If knock is only 6/8 (is that peak value or just what you usually see?) what's airflow voltage and injector duty peak?

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    Airflow voltage is over 4.0 wot but maf's voltage increases with the amount of air flows through it my wideband showing 14.7 and dropping to 11s on boost and injector duty is still not on peak because of maf. I am on same setup as i was .I am left now with only few things
    1.new spark plugs
    2.spitfires Coilspacks
    4.new fuel pump...might be


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