Question for anyone on stock 1JZ with walbro upgrade.

[Datsrboi]

For anyone driving on a stock 1JZ boost/simple bolt on and running a walbro upgrade and better if with a wideband.

What A/F are you you at idle and when under load? I just want to know how badly pig rich your car is. I filled up my tank 3 gallons exactly and only drove 12 miles and its almost out with maybe 1.5 gallon left (Its sitting on the bottom line so what ever it is).

I know installing a walbro on a stock car will cause it to run rich but I want to know how dangerously rich it will be. Would not want to flood my cylinder.

Mods are FMIC with hard pipe, stock y Pipe but 3 inch straight all the way to the end, walbro and thats all at 11psi stock

 

[viperkillertt]

The Walbro shouldn't be changing your a/f ratio. Your ecu controls your fuel, so something is quack with your ecu. ECU tells injectors to open, pump just flows up to the injectors. THere is a small possibility that it is increasing the pressure, but i would expect the stock fpr would control that.

 

[Bigzavs]

dat, you need to get a wideband and a SAFC on your car man

 

[viperkillertt]

I would definately drive her some more to get an accurate MPG. Mine sometimes looks like it is around 12mpg, but it usually is about 15

 

[one jay]

I know installing a walbro on a stock car will cause it to run rich but I want to know how dangerously rich it will be. Would not want to flood my cylinder.

false, installing a walbro cannot cause your car to run rich. increasing fuel pressure or increasing injector size could, but if you didnt do either of that, you car could be running rich if your o2 sensor is bad.

 

[Syris]

As everyone has already stated, the fuel pump cannot put more fuel in when it will be regulated by the Fuel Pressure Regulator. BTW I have a walbro installed and it does not run pig rich, note I do not have a AF gauge to monitor yet, but I can tell by exhaust.