Whatsup guys!! Im just looking to get some input from the pros, I have a fully built ls/vtec with a full race kit, E85 tuned on s300 in my 00 Civic Si. Now originally, I had this in 94 eg hatch with a walbro 255 in tank pump. I picked up an em1 shell with a sumped tank, so I went ahead and went with -10an fuel lines, x2 Ktuned inline filters, a single Bosch 044. For some reason its running like **** when I lay into it. My question is since i've upgraded the system from what it was previously, do i need to retune and upgrade my FPR and fuel return? Im stumped, it may just be something simple Im overlooking.


Thanks,

Jay

 

whats the wideband reading? how old is the fuel in the tank when you got the new car? whats the car do when you get on it?how do the plugs look

 

do you have a fuel pressure gauge?

 

how old is the gas/ since you picked up a shell with the sump tank already installed , did you clean the tank since it probly sat for a while

 

It may just be old gas, ill have to drive it again to see what afr's are again.

 

Tune your car.

 

what fpr you running?
sounds like you need a retune!

 

The e85 was in plastic jugs since around January, like stated, all that changed was the chassis and upgraded fuel pump, the car just feels like it cuts out a bit at full throttle.

Ill have to get to the shop tomorrow evening, but ill keep you guys updated! Thanks for te input so far!

Jay

 

with the fuel system upgrade, its possible your fuel.pressure has changed. what do.you have for a regulator amd gauge?

 

Stock fpr, I do have a gauge mounted on the fuel rail