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Should a z20lel astra sri 170bhp engine just be plug and play in a zafira gsi or is there anything that needs changed?

My z20let was ruined so looked for a replacement engine, i was told these are almost the same as a z20let and once plugged into the zaf gsi ecu etc would run same power as a 190bhp z20let!
The engine is fitted but as soon as the engines warm when accelerating and turbos spooling, boosting up it jerks and stutters badly and have to back off the throttle, from cold it seems fine
Any ideas ?
 
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