Cas issue

[nash47]

Hello , im new here and i have A31 home build 

RB25det neo stock eng / turbo 

aem ems 2 blue connector 

aem 3.5 map

aem cas disk

aem wideband connected to ecu 

355 lph pump

550 nismo yellow injectors side feed

aftermarket regulator 

and won’t start with base aem tuner basic tune

eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle 

Now it won’t start

Wideband reads 10 and 11 at lowest fuel setting 

and will share calibrations soon for aem tuner i think something is wrong in aem tuner 

 

please if you have any information, am very grateful 

 

 

 

 

[GTSBoy]

6 hours ago, nash47 said:

Now it won’t start

Wideband reads 10 and 11 at lowest fuel setting 

The wideband reading is meaningless if it's not running.

Why are you using shitty old sidefeeds on any engine, let alone a Neo? What manifold and fuel rail are you using to achieve that?

Beyond that, can't help you with AEM stuff as I've never been their ECU/CAS combo.

[TurboTapin]

20 hours ago, nash47 said:

Hello , im new here and i have A31 home build 

RB25det neo stock eng / turbo 

aem ems 2 blue connector 

aem 3.5 map

aem cas disk

aem wideband connected to ecu 

355 lph pump

550 nismo yellow injectors side feed

aftermarket regulator 

and won’t start with base aem tuner basic tune

eventually flipped cas 180 degree so it triggers on correct stroke not in exhaust cycle 

Now it won’t start

Wideband reads 10 and 11 at lowest fuel setting 

and will share calibrations soon for aem tuner i think something is wrong in aem tuner 

 

please if you have any information, am very grateful 

 

 

 

 

Your best and only option is to verify your CAS is reading properly with an oscilloscope (I'm presuming the V2's had a built in one) and then properly sync your ignition and mechanical timing using your offset angle within the ecu. I don't understand why you flipped your CAS. 

Edited 18 hours ago by TurboTapin

[MBS206]

34 minutes ago, TurboTapin said:

Your best and only option is to verify your CAS is reading properly with an oscilloscope (I'm presuming the V2's had a built in one) and then properly sync your ignition and mechanical timing using your offset angle within the ecu. I don't understand why you flipped your CAS. 

I'm going to assume they flipped it, as the timing setup in the AEM is catastrophically wrong.

Once it is fixed, they'll likely need to swap it back to normal.