new fuel pump ?
07-26-2007, 02:53 PM
#1
5th Gear Member
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Join Date: Jul 2006
Location: MISSISSIPPI
Posts: 3,382
new fuel pump ?
Ok, I installed my 255lph fuel pump and now when i'm at wot my air/fuel is around 10-11 instead of 12.2 like I got it tuned...
I was thinking it shouldnt have changed since i didnt mess with my fmu or my fpr.. why do you think it changed? attached is my dyno sheet
I was thinking it shouldnt have changed since i didnt mess with my fmu or my fpr.. why do you think it changed? attached is my dyno sheet
07-26-2007, 02:56 PM
#2
6th Gear Member
Join Date: May 2004
Location: las vegas, nv
Posts: 9,092
RE: new fuel pump ?
maybe you were maxing out the stock pump and just by luck it was runing a 12.2 afr. then when you put in a pump that can feed a lot more fuel, it filled the lines and rails to their max giving a richer afr.
on a return style fuel system, adding a bigger pump shouldnt effect afr because non needed fuel will go back to the tank.
on a return style fuel system, adding a bigger pump shouldnt effect afr because non needed fuel will go back to the tank.
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