ok car is 94 civic with y7-y8 head chipped p28ecu turboed 450 cc blue tops aem dsm fuel rail wired to resistor box blah blah it is plumeing black smoke what is the best way to adjust the fuel to stop ????? i have an idea of what to do but just seein what you all think

 

kinda confused about the y7-y8 head part. is it a y7 block with a y8 head? But you should get it tuned.

 

those 450s are probable to big, if you have a afpr i usually run mine at 45-50 at idle, i would get some smaller injectors. say mid to high 300s, how much boost are you running....

 

Does the P28 have a basemap for the 450s?? If not, there's your problem...PM Xenocron and get that worked out