my friend has a on3 turbo 08 mustang gt with 39lbs cobra injectors and walbro 400lph fuel pump module. if i take the fuel pump out and reinstall factory pump it starts right up and runs fine. put the walbro back in and leave the pressure hose off the top of pump module and it comes on and runs but no fuel comes out. we have sent the pump back to walbro and they tested and said it is working fine. put in a 5 gal bucket with fuel and ran 12v to it and it does indeed work fine. began changing the numbers in voltage vs flow vs pressure table and still cant get the pump to prime. ended up with the whole table set to 12.6v and gave up. billys newest tune 2 was the tune we were driving around on with stock fuel pump. the other tune is what i had changed to try and get it running with the walbro. thanks in advance for any and all help. please dont be rude about anything out of place in the tune as i am by no means a professional and it is also far from finished.
thanks Josh