Fuel Supply System

[bambam2000]

I got a check eng code 43 FUEL SUPPLY SYSTEM
and I was wondering what that consists of. my set up is a h22a turbo for the fuel i'm runnig an fmu, aem fuel rail, sfc field boxer controler. what going on rigth now is that every time I give it full throtle is leans out and at the same time my sfc goes into "of" mode instead of delivering more fuel

[boytiti]

Originally Posted by bambam2000

I got a check eng code 43 FUEL SUPPLY SYSTEM
and I was wondering what that consists of. my set up is a h22a turbo for the fuel i'm runnig an fmu, aem fuel rail, sfc field boxer controler. what going on rigth now is that every time I give it full throtle is leans out and at the same time my sfc goes into "of" mode instead of delivering more fuel

so there you go, you just answered your own question. your ecu is unable to conpensate for the lean A/F mixture at full throttle, therefore you get CEL code 43. you need to re-progs your ecu look-up table. that means the values need to be changed to higher numbers until you get rich running condition on full throttle. moding your shit takes a lot of trial and error until you get it right.

[bambam2000]

Originally Posted by bambam2000

I got a check eng code 43 FUEL SUPPLY SYSTEM
and I was wondering what that consists of. my set up is a h22a turbo for the fuel i'm runnig an fmu, aem fuel rail, sfc field boxer controler. what going on rigth now is that every time I give it full throtle is leans out and at the same time my sfc goes into "of" mode instead of delivering more fuel

but hte thing is that my sfc doesn't want to do the job even if i add just 1% more at each rpm if just doesn't do it, it goes into "of" mode. do you think the sfc is bad or the ecu is bad or what?