06 STi- Car starts then dies out. Cobb SD setup

[NA STI]

Iv spent over a year working on this car and doing a full build and finally got everything back together and ready to startup. Anyways Im trying to run a full SD setup and I have maf unplugged and all codes deletes to take care of the CEL's for my mods and removal of parts. I have no CEL at all and fuel pressure stays solid when the car dies out. It starts up normal and easy then within 1 second just the motor dies out abruptly. Im not sure if I need to modify more stuff in my map to make it run or what, all i have done so far is adjusted the injector values and scaling and adjusted for my AEM IAT sensor and deleted the necessary codes on cobb SD map, then flashed the map.

Could this be a immobilizer issue? or would the car not start at all?
possible bad alternator?
Dont think it would be fuel pump because my fuel pressure stays up.
Or if its just that I need a better basemap to be able to startup and run without dying out for my setup.

Here is the full mod list...
-06 STi with stock motor around 15k miles on it and perfect compression
-Cobb V2 AP- Speed density setup with LC/FFS
-Tigwerks full rotated 321ss vband kit with EL header, 3" catless downpipe
-Turbosmart 45mm hypergate with dumptube
-GTX2867 with tial .64 vband housing
-NGK 1 step colder plugs
-ETS TMIC
-AEM IAT sensor (installed in custom made tmic bov/bpv block off plate with hole tapped in center for the sensor, will be running no BOV or BPV)
-T1 side feed kit with ID1000cc injectors
-weldon 2040 FPR set at 50psi
-Golan 6an inline fuel filter
-Walbro 400 intank pump with stock fuel filter removed
-Full EVAP system removed from back of car and bay
-Grimmspeed ported,polished, and coated intake mainfold+TGV deletes
-Hallman Pro RX boost controller

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[jesterjames]

Originally Posted by NA STI

Iv spent over a year working on this car and doing a full build and finally got everything back together and ready to startup. Anyways Im trying to run a full SD setup and I have maf unplugged and all codes deletes to take care of the CEL's for my mods and removal of parts. I have no CEL at all and fuel pressure stays solid when the car dies out. It starts up normal and easy then within 1 second just the motor dies out abruptly. Im not sure if I need to modify more stuff in my map to make it run or what, all i have done so far is adjusted the injector values and scaling and adjusted for my AEM IAT sensor and deleted the necessary codes on cobb SD map, then flashed the map.

Could this be a immobilizer issue? or would the car not start at all?
possible bad alternator?
Dont think it would be fuel pump because my fuel pressure stays up.
Or if its just that I need a better basemap to be able to startup and run without dying out for my setup.

Here is the full mod list...
-06 STi with stock motor around 15k miles on it and perfect compression
-Cobb V2 AP- Speed density setup with LC/FFS
-Tigwerks full rotated 321ss vband kit with EL header, 3" catless downpipe
-Turbosmart 45mm hypergate with dumptube
-GTX2867 with tial .64 vband housing
-NGK 1 step colder plugs
-ETS TMIC
-AEM IAT sensor (installed in custom made tmic bov/bpv block off plate with hole tapped in center for the sensor, will be running no BOV or BPV)
-T1 side feed kit with ID1000cc injectors
-weldon 2040 FPR set at 50psi
-Golan 6an inline fuel filter
-Walbro 400 intank pump with stock fuel filter removed
-Full EVAP system removed from back of car and bay
-Grimmspeed ported,polished, and coated intake mainfold+TGV deletes
-Hallman Pro RX boost controller

You need to build a base map to begin with. It sounds like you didn't do your homework on speed density or tuning in general for that matter. It would be best for you to start the car using the maf and go from there. Read the cobb speed density tuning guide and start doing some home work on tuning in general. Or just pay to have it tuned

[NA STI]

I understand that and did read thru the guide, I did the injector scaling for my injectors and sensor adjustments and made a simple SD basemap. Im not trying to fully tune my car myself but id like to just be able to get it to stay running before I pay $400 for a tune for them to tell me something else is wrong... im just trying to figure out if it just needs a better basemap just to be able to idle without dying or if something else is wrong.

[sogah87]

try stock fuel filter

[Cobb Tuning]

Originally Posted by NA STI

I understand that and did read thru the guide, I did the injector scaling for my injectors and sensor adjustments and made a simple SD basemap. Im not trying to fully tune my car myself but id like to just be able to get it to stay running before I pay $400 for a tune for them to tell me something else is wrong... im just trying to figure out if it just needs a better basemap just to be able to idle without dying or if something else is wrong.

If this is the first time you've fired up the motor, there's a lot that can potentially go wrong here either from the mechanical side or from the tune side. I would probably just take it in. You can try to manipulate the VE table (via real-time) to see if you can get it to remain running. But, the front o2 is not going to be ready that soon after starting, so you'll have to experiment (I would guess you are probably too rich, so start by decreasing VE significantly in the area where it starts and stalls).

Bill

[NA STI]

got it fixed and running without dying out, It ended up just being the tune and theres nothing mechanically wrong with the car which i was worried about. Thanks