Subaru MAF DIY Wiring

Hello,

looking to get some help on doing a DIY MAF wiring to a 2 wire TurboSmart IAT sensor. Previous owner already cut up the OEM MAF sensor and I just did an entire bottom end rebuild of the car(see details below). Already tried to conduct first start procedures multiple times and the car dies in 5 seconds.

COBB Accessport reads 0 volts for MAF, but the it reads the air intake temp fine. (See video)

I would assume that having no MAF volts is the issue why my engine isn’t starting. (Unrelated or not, I do have a small rear main seal leak, and my oil pressure gauge is faulty(AEM)).

anyone know of having 0 MAF volts would cause the engine to die?

10 STI Hatch Build

Ej257 OUFRONT Closed deck seasoned case halves with bore set at 99.75mm

STDX main Journal Bearings

JE 99.75 Pistons

Manley Turbo Tuff I beam rods STDX rod bearings

ARP ROD BOLTS stretch @ 1).061 @45ftlbs 2) .061 @50ftlbs 3).059 @45ftlbs 4).060 @50ftlbs

RCM 1.1mm Head gasket

ARP2000 Head studs set at 120ftlbs~

Ferrea 1520p/1514P STD racing valves

Super tech dual valve spring kit

GSC Stage 2 272 deg Cams

Valve lash set @ IN:.008 EX:.010

Asin timing kit w/water pump with RCM race thermostat and housing

RCM 11mm modified Oil pump(packed with Vaseline and locktight)

IAG turbo feed line kit

KilerB Competition Oil Pan w/Pick up

RCM Racing OIL BAFFLE

Cylinder 4 cooling mod

IAG AOS COMP V3

EGR Delete

-8AN fuel lines w/ radium FPR(w/ gauge)

FIC1450 Injectors

COBB Flex fuel sensor on Radium Adapter(iWire modified straight to the ECU)

Radium fuel filter 10 micro

Dual Walbaro 450 on Radium Fuel Hanger

OTL TGV Deletes

IAG fuel rails

Phenolic spacers

Perrin boost controlleR

Cobb 4BAR MAP sensor

MAF to IAT conversion kit

Grimspeed cold air intake

FRP Red 84mm Turbo w/ 84mm silicone intake

COBB FMIC w/ Perrin BOV(2015wrx)

AEM Oil pressure sensor(gauge faulty)

AEM AFR Gauge

IAG UEL Headers

CNT upipe

TurboSmart comp gate 40 external wastegate with 7psi spring

Invidia catless DP

Express single exit catback

EXEDY Twin disc clutch(rebuilt from triple disc)

Derek,

Without a mass airflow sensor signal, you'll need some manner of airflow calculation for the vehicle to run. Without seeing airflow, fuel requirement can't be determined properly, nor load, etc.

Determining airflow can be done with a speed density model if you're using tuning software/hardware that supports that i.e. COBB.

So I do get air flow and air temp signals, just no MAF volts.

Mass airflow is generated from a failsafe state based on throttle, RPM, manifold pressure when the MAF is unavailable, or if you are running a proper SD setup, then airflow is generated from the SD model.