hello all im new to the forum and searched high and low for a answer to what could be going on with my car but havent found anything that would b a certain fix...i bought this car last winter,got it for amazing price but instantly had to put all new axels,tie rods,wheel bearings, full 3inch turbo back and the intake ...i have gotten rid of 4 codes the car had but am now stuck with these two... p1136 is b1 system to lean , for this problem people have told me to change the o2 sensor which i did and nothing, then another mechanic told me sense i dont have a cat on my downpipe anymore i may need a 90 degree o2 spacer on the downpipe which i did and it still came back,anything anyone can help me with would b awesome.p1476 is vacuum so i visually checked all the lines and they look decent so next im going to pull off the mbc that is in the car and throw it in trash! im getting 20 vacuum and 5 to 8 psi boost when mbc is turned off..honestly im losing faith and need help thank u

 

anyone plz help