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2012 Buick Regal GS big turbo. Stalling, lurching, etc.
Howdy. I'm helping a dude with a 2012 Regal GS with an S257 63mm turbo. He paid to have someone tune it and they did a poor job and even broke some parts.
The guy says his car stalls and hesitates/lurches.
I have attached his tune file and a series of logs from pulls, to duplicating the complaints.
I'm entirely unfamiliar with the platform so I am hesitate to make any judgements/determinations. It would be great if the community can help this guy, he's already been taken advantage of.
Thanks in advance.