Quote Originally Posted by Nick07 View Post
I know a lot of turbo guys run way smaller plug gap then that, iirc more like .030-.040. Somewhere in there anyway, pm Tengis
Yeah, i run AL103's gapped at .036

And, for the AFR you want to be in the range of 11.0-11.5ish on a daily driver boosted setup running pump gas.

+16.4 fuel trims usually indicate a vac leak. Check all your lines for leaks, egr, whatever you have connected to the motor that might be a source for air past the MAF. Sometimes the maf/tune could be so off that it may just need more fuel, most of the time it's un-metered air entering post maf.