Quickie about the SCT tuner

[Mr. Man]

Do you need to return to the stock tune before you use a different performance tune, or can you change from one tune to another w/o returning to stock first i.e.. 3.55 to 4,10? :)

All on the same tuner.

Just wondering as the tuner didn't come with directions.

[Mguildo]

No need to return to stock . I had the same ? When I installed gears Marty ochs said just switch and it worked

[offroadkarter]

you just re-program the car with the changes for the gearing, no need to revert to stock first. Going back to stock is only to divorce the handheld from the PCM.

[03Merc]

Use a gps app to make sure the mph is same as dash, I had to adjust My tire revs a bit to correct it.


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[Mr. Man]

Thanks for the responses. :beer: