Have you deleted the original codes that were present? Also, have any new codes come about? Have you checked for engine vacuum leaks?
Do me a favor. If you have a live data scanner, tell me what the short term fuel trims are. That could be very helpful to me.
Also, here is a link that covers the most common causes for a surge. Take a look through it. Many of the things you have already done, but something there may help.
Let me know.
Monday, December 2nd, 2019 AT 8:34 PM