Have you guys got the SDS Dash (data downloader) from Ross? Invaluable for tuning for the right AFR ranges.
What ever O2 sensor unit you have installed, be sure it's data is uploading to the SDS module. It doesn't directly affect the mapping parameters, but is downloadable to the SDS Dash on your laptop. You want to see the AFR trend reactions to the various sensor inputs as they happen.
Tuning by EGT/CHT is like going target shooting with the wrong pair of glasses on.
Toobuilder - the SDS Dash graphical presentation would highlight the map parameter that's causing that ragged transition real quick.
built a few RVs, rebuilt a few more, hot rodded more, & maintained/updated a big bunch more
Last edited by Ralph Inkster : 02-05-2021 at 11:37 AM.