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Subaru Sti EJ20 trigger error/stalls at around 4000-5000 rpm


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That scope looks all good too.  Possibly there is some noise issue interfering at higher loads or something.  Does boost level have any influence on the trigger error?  Can you give a bit more detail about the car, does it have resistor spark plugs?  


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HI Adam

This is a 2004 subaru wrx sti with an ej20/25 engine (ej20 head/ej25 block) and intake avcs (cam control) Atp gt30 turbo/ id1050 injector /dw300 fuel pump /hks m40 spark plugs. because the original ecu is a non avcs ecu. So we use wrx7-9 G4x Plugin instead and everything was working fine before we used the original ecu. Now static free rev to 4000-6000rpm is ok.
It happens when the dyno pull after 90kpa boost & 4000rpm . Thank you.
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