Need help! Extended crank

[Andrxs.R6]

Hello guys, I have a 2017 pp1 that I had bought used. Long story short I got a rod knock and needed my engine repaired or swapped. It has an extended crank and the rod knock sound. The dealer here flashed my Ecu to stock saying there was a tune uploaded. Long story short I got frustrated with them and took the car to a shop to get the engine replaced. With the new engine now I still have the extended crank, car sounds quiet on cold starts and the rpm’s are sticky. I’ll be at a complete stop and the rpm’s will still be the same as the throttle was stuck. When the car does turn on there is no power loss it’s not on limp nor miss-firing. Car has had the Transmission, clutch, flywheel, block, and battery replaced. Only thing done to my car is a intake that it came with so my only suggestion is that the intake needs to be tuned. Any suggestions that may help me with my problem?

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