Turbofox88

Hey guys I have a blow thru setup on my 5.0 mustang with a Precision turbo and it will not go past 3-4 psi and will the engine will not go past 2800 rpm. Even if my foot is to the floor. I hear the turbo spooling but not all the way. It sounds like it want to scream but Nothing... Any ideas on what this is? Boost leak? Bov? Wg? Getting so frustrated I haven't heard this baby scream yet. Please help :/

jeremy_nash

blow through carb or blowing through the maf?

Turbofox88

It's a blow thru carb

busa4

did you add a fuel pump assembly with a boost reference fuel pressure regulator?

Turbofox88

This is the regulator I have Mallory Ignition 4309 - Mallory Fuel Pressure Regulators - Mobile SummitRacing.com and I have the stock EFI fuel pump

busa4

you removed the factory fuel injection for carburation?


do u have a wideband afr gauge installed? need more info of setup and post pics please......

Turbofox88

yes i have a wideband and i have a precision 65 mm turbo, turbonetics evolution wastegate, turbo technologies intercooler, tial knockoff bov, holley 650 double pumper carb, stock fuel pump and the regulator i listed before. i keep hearing fuel delivery problem from people. the only reason i can think of why its doing this is because the regulator says it ranges from 3-12 psi which is not enough but its boost referenced

busa4

what is your wideband reading when this happens?

Turbofox88

The wideband reading seems fine, not leaning out or else the gauge would flash red