Bank 1 lean indicates an air leak. Too much air after the MAF.

 

Thanks Ill check in to it.

 

I did a similar intake change yesterday. Got the same code. I checked the inside diameter of the pipe where the maf sensor lives and it was 2.25. I changed from the 2.5 to the 2.25 and it runs great. No lights. No chugging.

 

Sbrice54, is your cah running with no codes being thrown, now, cause I took mine off, I think its because the Maf sensor tube I have on the the after market induction tube is too large, its 3"

 

I used the 2.25 inch tube insert.

 

Reworked Mine got it all working now throughing no codes and Im using a spectre Maf tube