I got a Eflash from a vendor here a couple months ago and i just got a fuel pump...the tune was for tbe,intake,mbc. I want to add in the fuel pump...do i need to get retuned or can anybody help me modify some parts of my map for the fuel pump. thanks.

 

I didn't have to retune after I put in a Walbro 255. Others have claimed they had to. A pump just means there's enough fuel at the injectors. It don't see how it increases more fuel out of the injectors if you upgrade just the pump.

 

It depends on the pump...the Walbro 255lph HP pumps run at a higher pressure than most pumps, and higher pressure through the injectors usually means slightly more fuel.

 

just get evoscan and a wideband, see where your afrs are and the lean the map out. which you wont be leaning to much but you'll see where your rich.