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I have a OBD2 splitter and I leave the MPVI2 pluged in under the dash with the wideband is that still ok.

I did the MAF first and then the VE. Turned off my Wideband and I think that probably got my problems fixed. How can I turn off the wide band to the computer and leave the gauge on?

These ltft need to be cleared each time? If so before the file is saved, flashed? Do these ltft mess with you while you trying to tune. After MAF Tuning turned all back on and fuel starts going lean,...

Thanks

Do the ltft's have to be clean after maf tuning and sd tuning? lf so how do I reset them.