Low timing e85 and high emissions

[Thom-5832]

Good evening, last week I got my car first time on dyno and now I had to go MOT but got stuck on too high emissions, CO and HC.
Today I tried to get better emissions playing with timing and fueling but no succes yet also getting quit high EGT on cruise 850-950c

AAN engine, tatech ecu using stock triggering.

Using e85, to me timing map already looked quite "soft" but now when I double checked ignition timing with scope it was way off no marks visible for some reason tuner had changed the trigger offset to 77 BTDC, now lowered to 64 degrees and have matching marks.
Changing trigger offset changes whole ignition table, in my case I would have to retard by 13 degrees wich means it would run very little advence...

Car made 554hp with "wrong?" Timing, tuner said he started to hear some noise in headphones when he tryed more advance, engine still breakin rev. Limit set to 7000rpm and max 2.0 bars boost.


Example of ignition table: 15th post is 1.0 bar boost and the marked post is 2.0bar 6500rpm
Now if I would retard by 13 degrees to composate the "new" trigger offset there's like nothing left? I did not testdrive yet with new offset.

Feels like something is off, timing seems too low anyone some input?

[Error404]

From memory, stock TDC reference pin is 58deg BTDC, but could be wrong. If timing is heavily retarded, combustion is taking place in the exhaust system causing high EGT and poor burn = high emissions. You really need a new tuner if they can’t even set static timing correctly.
Cant make any sense of your table on my crappy phone screen though

[Thom-5832]

Will try to make better pictures, it shows 6500rpm ignition table, marked post is 15 degrees at 2.0bar and for example 27 degrees at 1.0 bar

feels like no sense retarding even more by 13 degrees.
Trigger pin is at 62 degrees, but got best mark matching with 64 offset.
As the tuner is the developer off Tatech im very sure he know what he's doing even though something seems off now... I will contact him about this just curious what u guys think

[prj]

Most retarded ECU in the world. I've had the "pleasure" of touching it once and NEVER again.
For MOT you need a cat. CO will be high otherwise. HC should not be high though, probably mixture is wrong.

I don't know what to say. Let them sort it or bring the car to me and I'll sort it with a different ECU.

[Thom-5832]

Most retarded ECU in the world. I've had the "pleasure" of touching it once and NEVER again.
For MOT you need a cat. CO will be high otherwise. HC should not be high though, probably mixture is wrong.

I don't know what to say. Let them sort it or bring the car to me and I'll sort it with a different ECU.

Dont believe its ecu to blame, you have recommended tatech to other before...sure if you don't like it so be it anyways cat is installed and no exhaust leaks so must be ignition/mix related.

what about the hall/home and vr/crank sensors signal, using falling edge currently but when changing hall signal to rising edge it seems to effect timing pretty much, probably only way to check by oscilloscope what signal to use?

[Error404]

If your crank reference sensor is inverted to what the ECU expects, then timing will drift. You can check with a scope using fixed timing value, as with setting base timing. What is you lambda target & actual values when you fail emissions?

[Thom-5832]

Lambda 0.96 at ~2200rpm and matches target, picture left side is idle and right ~2200
lambda is not the problem now , just co and hc

[prj]

Why would you have 0.96 at fast idle? Needs to be 1.0.

[Thom-5832]

Why would you have 0.96 at fast idle? Needs to be 1.0.

Yes have changed targets when trying to get emissions down, what is it you did not like about tatech? You are motronic guy but what's so bad about it? This is the first time for me using stand alone but to me it seems quit easy to use

[prj]

The tuning interface for one. Its like something out of the 90s.
You just have not seen modern stuff.