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#NGTT Initial setup problem


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I am stuck with initial setup on my ER34. 

Engine start and run well on reach AFR (10:1) but try to stall if TP inreased (TP delta is aprox 4%, at this moment AFR is about 22:1). 


* RB25DET NEO (with stock internals and sensors)

* FFP with 80mm throtle

* Holset HX35 turbo

* Aeromotive FPR

* Innovate LC2 

* Siemens DEKA 630cc injectors


The problem is on injectors setup. I try to use traditional and modeled fuel equation with this injectors but have no result. Almost all params in Fuels Setup doesn't affect AFR on idle. Only MinEffectivePulseWidth and InjDeadTime affect AFR. 

What i'am doing wrong in my setup?

Thank you in advice.

P.S. attached pclr with traditional fuel equation.



Log 2017-04-25 9;14;53 pm.llg

Edited by vers_us
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I would suggest, if you don't know the correct parameters for the injectors to use traditional equation mode.

Have you already tried to change the master fuel ?

Yes, i tried to change master fuel (reduce it to 4ms and increase to 17ms), but it doesn't affect AFR. As i said only MinEffectivePulseWidth and InjDeadTime affect.

Have you checked fuel pressure?  You have a fuel pump speed controller connected to Aux 5 on that car which may not be setup/working right. 

I'll try to check fuel pressure. 

Fuel pump is Tomei replacement for GTT/GTR (as far as i know GTR also has fuel pump speed controller). How i could check configuration for it?

P.S. Thanks for replies 

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  • 4 weeks later...

Thanks for reply Adam!

Still have issue with ECU setup. 


I've check fuel pressure and its normal (about 2.4 Bar on idle and 3 Bar if engine stops, also i try to accelerate and it's goes up and down with MAP). 

As you can see on image if i try to rev engine AFR goes to 22:1. Same thing happend when i switch gear up.  No matter acceleration enrichment is ON or OFF.


I will be grateful for any help.


Log 2017-05-18 8;12;51 pm.llg

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You have something odd going on here?  The ECU seems to be commanding approximately correct pulsewidths yet your Lambda goes to the sky.

It is really odd the in the plot below, you snap the throttle shut quite quickly yet MAP is very slow to return back to vacuum.  Usually MAP and TP follow very similar trends.  To me this suggests there is possibly something mechanical wrong - maybe a manifold leak or something?  Also the fact that you have a VE of 80% at idle suggests something like injector flow rate is not as expected.


Edited by Adamw
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