Hopefully Walker chimes in and lets me know if the rebuilt tune fixed the issue. Strange indeed.

I have another customer who thinks he may be experiencing something similar, albeit more intermittent. I've asked him to log MAF rate to see if we can draw some parallels.

O.S. on Walkers is: 52606128
O.S on the previous truck was: 52616698
O.S on the newest suspect: 52616698

I have yet to see it on the latest O.S. - Might be the one to try to update to Harley...