Hey, I need some serious input. I am running LEAN from 5500-7000 range. It doesnt seem to matter what values I put in high octane fuel map i cant get lean enough. I started with lean spool enabled and disable because it was leaning earlier. I know map needs work, im just trying to get to target AFR's and cant seem no matter what. I have replaced vacumm hose from FPR to Mani and added hose clamps and eliminated Fuel Pressure Solenoid completely. I have boost leak tested. I even pulled fuel pressure relay #3 and tested by jumping and completing circuit causing high voltage to fuel pump, still running lean. Yes I did replace relay and not leave jumped. Any thoughts inputs welcome. I am running out of ideas, mods in sig.

 

sounds like your pump cant put out the fuel it needs to put out. what do u have a walbro 255?

 

Stocker still, I have read stocker good till 400WHP, can anyone confirm or deny? I guess I need to order one and eliminate it being fuel pump. I know I am seeing injectors hitting 110-115% in EvoScan.

 

you need a fule uppgread , watch out that enginge , so you dont spike

 

Evo 8 fuel pumps are barley good enough for stock power. It should have been one of your first mods.

 

Yeah stock pumps will no where near handle 400 hp whoever told you that doesn't know wtf there talking about. 255 pump should have been a first upgrade as stated above.

 

Cool guys I am ordering one. I will report back after install.

 

stock fuel pump was issue. I replaced with walboro 255.