IAA 2019 @ Frankfurt, Germany

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Hi everyone, i'm driving wira 4G93T GSR engine. yesterday my car was suddenly jerk during driving. aAt those time the RPM is arround 2k to 2.5K. After that, it was happened quite often but it doesn't happened in idling time.
Is it a sympton of broken fuel pump? or ignition problems?
I opened the spark plugs but it looks normal, brown colour.
so, what is the problem actually? is it also come from my FICD that i installed?
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