rb20det CAS/timing QUESTION

[jesse0357]

alright few questions for anyone who can help me out. I've been getting a fuel cut or something along the lines of that around 5k. so i started doing some basic checks just to be sure it wasn't anything else. so far I've checked my TPS, is fine, i adjusted my timing to base 15*, when i did that motor idled awesome and ran good up to 4500 and then hit like a small rev limiter. i then advanced the timing to 20* and it got better, advanced it more and ended up maxing out the CAS and its at about 37* advanced thats the only way i can get it to run good. according to my wideband its fine up to 10psi boost/5500rpm then leans way out. my question would be why do i have to have it so far advanced to run right? BTW my ecu has been tuned by Carl H no fuel cut or boost cut. I know need bigger injectors but what see could it be?