My car was running 11.6 a/r with factory pump, I choose to install a walbro pump for insurance, since I install the pump the car is runnning much leaner 12.3 aprox, so I cant enjoy the car. And the car is taking more time to start, its like the fuel rail is empty when the car stays to much time off. I check everything and the instalation its correct, I just give up because I dont find the problem.

If someone has a solution for me other than changing to factory pump, let me know.

 

what kind of injectors you running?

 

What PSI is it 12.3 AFR seeing?

 

Did you re-tune it after changing the pump. I would imagine with a change like that you'd have to re-tune.

 

as soon you step on the throttle, before the pump change when you step on the throttle the afr goes to 11.6, now it stays on 12.3

 

no I didnt retune, my friend got the same pump without re-tune and his car is running well on afr

 

did you have trouble installing the walbro pump?