getting a CEL Stage 4 base &stage per.

The motor seems to stuble and kick CEL on when i put the hammer down!
But CEL just flickers on and off it doesn't stay on and normel driving it's fine even with a little boost no problems! What's going on please help! here's my mod list and other info:VF22,STI PINKS,
UTEC(STAGE4),MRT TMIC,TBE,UP PIPE,WALBRO 255 and i'm useing the ABC boost controler from Turbo XS!BY the way 2002 WRX WAGON. So any help would be awesome!!!!!!!!!

Just put the UTEC,VF22,STI PINKS,Walbro 255 in yesterday so guessing something to do with that!!

 

http://www.mnsubaru.com/forums/topic.asp?TOPIC_ID=353&SearchTerms=knock,CEL,utec

 

Thank You!!!!!!!!!