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Hi All sifu,

need help on my Viva converted to EF-DET 660 turbo engine

I'd remove the boostcut but I found problem when running at high boost, the sympton is funny sometime the car pickup/boost up smoothly unitl 1.0~1.2 bar, but most of the time the car boost showing 1.0 bar but car don't feel the pickup and some time "semput" and jerking.

Any idea what is wrong?
1) Is the fuel pressure not enough?
2) Any way to install an adjustable fuel regulator?Viva don't have return line, so...
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