HI can anyone help i have a 1998 jdm wrx with a earlya wrx closed deck block and heads. im having a problem with it running to rich. ie black smoke on tick over and low mpg. it has yellow top injectors / vf22 turbo. orange maf. and 1s ecu. im new to the site so sorry if im not apro at this atm.

 

please if anyone can give me some info. churrs