As far as disconnecting the ECM, it will relearn everything within a few miles. If you have taken trips, that information should be saved again.
Now, a loss of power, high RPMs, and chugging can be a few things. Have you checked fuel pressure? If it is off (too high or low) it can cause this. Is there any smoke from the exhaust? Have you scanned for codes now? Does the exhaust have an odd smell or sound to it?
Let me know.
Monday, August 30th, 2021 AT 5:24 PM