Often surging can be caused by Acceleration Enrichment (AE) being active at the wrong time. Maybe the parameters for the MAP Delta Difference for AE Active or the TPS Delta Difference for AE Active needs to be adjusted? Possibly a flat spot in the TPS sensor, or a faulty MAP sensor is setting AE active at the wrong time?

The TunerPro RT "dash" will show when AE is active. The TunerPro RT data log can be exported to an Excel spreadsheet to sort or filter when AE is active.

dave w