If it was a crank vibration your crank angle sensor would pick it up. Did you get the tune from Sasha? Might not be a bad idea to check with him to see if the P0300 code is turned off with the uprev? I know for a fact that even with my launch control on my car does not throw the P0300. I would suggest flashing it back to stock (only to idle it) and seeing what type of codes you have at that point.
The car should start and idle even with the aftermarket injectors, its a quick easy check for you.
Hope that helps,
Goodluck!
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