Help! Forgot to disconnect the battery when cutting my mafs harness!!!

[D-UNIT]

dude it honestly sounds like aboost leak. Check all of your piping and couplers after the maf. If that is all you changed and then changed back. You could have easily bumped off a hose playing around under there j/k! Even a super small leak , under boost will become a hugh one. Letting out precious metered air causing your ecu to dump ungodly amounts of fuel into the cylinders to macth the " air that isn't there". Which in turn cause huge amounts of black smoke and no revving for you. KISS

[nissanfanatic]

Any of the settings on your SAFCII change?