yeah no issues as long as you keep it slow and low rpm.
i've switch back and forth a couple times now and i've found it takes the ecu about 15 miles for all the trims to settle back down.
i usually would switch fuels, drive about a mile, pull over and flash new tune. then drive it normally for the next 15 miles before i get on it.
Quote:
Originally Posted by Lemar58
Is it bad if you flash before the fuel trims start going negative?
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Quote:
Originally Posted by steve99
Should be fine as long as you drive sedatly no WOT, till the ecu i.e the ltft have settled back down to less than 10% or so on new fuel, might take 10 to 20 km or so.
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