i thought your was d5 so to be clear is your 4cylinder vea engine or 5 cylinder engine
ecm-p04d900 cooler renewal then check egr valve for siezure sticky?
make sure its had new hose kit fitted also check inlet manifold temp sensor,e-map sensor for clocgging up O2 sensor clean out reset adaptions
is it on latest ecm sw?
have they done cylinder leak test ?
regards
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