Speed density motronic tuning options?

[ottawa coupe]

I have purchased chips for a speed density tune for my s6 and they are running incredibly rich. 11.5:1 afr at best. I am waiting to hear back from the tuner as to how to progress. I am confident there are no issues with the car as it runs properly with no codes in factory configuration.

However, it would seem that the converted ecu is not running in closed loop. I have heard from others who have contacted me that it is becausecthis tuner turned off that functionality. Again, i am waiting to hear back from the tuner to confirm.

But, if this is the case, then i will be asking for a refund or a credit as in my opinion, the tuner is simply throwing numbers at the wall and i have nothing but a digital carbureter... not exactly the point of the exercise....

Is there a tuner on that side of the pond that has a quality tune for the oe motronic with a tte420 turbo and 630cc injectors?

I had vems for a bit, but it bricked. It has been sent in for diag and possible repair but i do have doubts about it's reliability.

[CREASE]

I went the other way for my speed density tune, PM me for details as I see no names

[-ice-]

A closed loop lambda control is not the healing for a wrongly tuned ve-table. You could drive it then lambda 1 in part load(if lambda control was active), but all the transient fueling and also fueling under wot would be wrong.
You need a tuner who will tune this to your engine.

[ottawa coupe]

So, after months of it sitting in a drawer, i finally got the revised chip installed.

MUCH better.

However, i wonder if i had another hidden issue all along. I hopped in the car after a coupla weeks a few days ago and the aem guage read full lean and didn't move. Did some reading and tinkering and figured it wasn't making a good ground thru the main body to the downpipe. Hit it with a wire wheel and it works again. Wondering if this is my closed loop issue? Haven't been able to check yet if this new chip is getting into closed loop though.

[ottawa coupe]

FINALLY figured out what is going on. My bnib bosch o2 sensor is poop, no voltage coming out of signal wire. Put in a test point on the wbo2 harness and verified the simulated signal is correct. And reread the damned service manual.

The ecu corrects afr between 14 and 15 afr only. My idle is 15.5 or so. Blipped the throttle and for a brief moment the lambda values in vcds changed indicating control.

So, to me that means the base value is too far out at idle (need to pay attention to the rest of the driving conditions) but the system is not broken.

So, will get some more info to tuner and get another chip and that should get it sorted....