Car starts but won’t stay running

[Jackson H]

Hey guys, I need some help. I just bought a 2013 mazdaspeed 3 with a blown turbo and replaced that k04 with a bnr s4 paired with a grimmspeed 3 port boost controller. The car ran fine before the swap as I drove it to my buddies shop. But after we reassembled everything we had this problem and it has not gone away. This video shows the exact same symptoms I am having

any help in greatly appreciated!

 

[Easter Bunny]

did you change the intake size with the swap? do you have a basemap for the new turbo and ebcs flashed to the exu?

 

[JohnnyTightlips]

Check the fuel pump resistor. It can be jumped for testing. It is under the intake on the frame rail.

https://mazdaspeeds.org/index.php?t...build-maximum-carnage.7025/page-21#post-97649

 

[Jackson H]

did you change the intake size with the swap? do you have a basemap for the new turbo and ebcs flashed to the exu?

I am still running stock intake. I don’t have a basemap just stock tune but according to graveyard performance I won’t need one because this turbo is a drop in replacement. I have not flashed the ecu for the EBCS but it seems to be working because you can hear it click when given throttle.

Check the fuel pump resistor. It can be jumped for testing. It is under the intake on the frame rail.

https://mazdaspeeds.org/index.php?t...build-maximum-carnage.7025/page-21#post-97649

I will definitely give this a look, thank you

Hey guys, I need some help. I just bought a 2013 mazdaspeed 3 with a blown turbo and replaced that k04 with a bnr s4 paired with a grimmspeed 3 port boost controller. The car ran fine before the swap as I drove it to my buddies shop. But after we reassembled everything we had this problem and it has not gone away. This video shows the exact same symptoms I am having

any help in greatly appreciated!

Also I meant bnr s2 whoops

 

[Easter Bunny]

The three port definitely works differently than the stock ebcs so you do need a time for that. The s2 also will push more air than stock. Not enough that you really need a tune for getting the car to run but you will need a tune soon

 

[Jackson H]

The three port definitely works differently than the stock ebcs so you do need a time for that. The s2 also will push more air than stock. Not enough that you really need a tune for getting the car to run but you will need a tune soon

Yeah for sure, would it prevent the car from running though?

 

[Jackson H]

Check the fuel pump resistor. It can be jumped for testing. It is under the intake on the frame rail.

https://mazdaspeeds.org/index.php?t...build-maximum-carnage.7025/page-21#post-97649

Just jumped the resistor and still had the same problem

 

[Jackson H]

I’ve also cleaned and retightened all of the grounds and it’s all been to no avail

 

[Easter Bunny]

Yeah for sure, would it prevent the car from running though?

I think it should still idle

 

[Jackson H]

I think it should still idle

Yeah that makes sense to me, here is a video of my car for reference

 

[Jackson H]

And I just replaced the fuel rail pressure sensor and the fuel pressure regulator

 

[Enki]

Unplug the MAF, try to start the car. Check your HPFP spill valve connection as well.

Edit:
Also, with the key on, start a log (everything enabled) on the AP and try to start the car. This is likely to show exactly what's wrong, and you should do this anyway regardless of the results of unplugging the MAF.

 

[Dougj]

Any luck on this issue? I am experiencing a similar thing