ECMlink WBfactor all over the place

[Gizmo63T]

Hello.

We tried to tune 1g Eclipse with SD on dyno and we have a problem.
I understand that the WBfactor should just give you information between WB sensor and what is in the table and tell you how much you are off from wanted value.
WB sensor is reading constant value and it matches the tables, but wbfactor is all over the place.

AFRatioEst is also all over the place. What table does AFRatioEst uses or what table should i change to smooth it out? is it VE table or OpenLoopMaxOct table?

 

[Gizmo63T]

On wiki it says that AFRRatioEst is using among all, injector pulse.
Injector pulse is also going up and down, it is not constant.

What can cause injector pulse to act like this?

 

[Nate355RS]

Subscribing to this, I have a similar problem. Dips in InjDuty cause spikes in AFRatioEst in my logs too. I also have FIC high z injectors, not sure if that plays a role.

 

[Gizmo63T]

This is actually my friends car.
He uses FIC 850cc low z.

We switched from SD to MAF and now car runs better, but MAF gets overran fast so that is not a solution.
And we still have RPM line choppy. Injectors react better, no spikes.
Is your RPM steady or choppy in log? We found that RPM line is choppy above 3300rpm.
Engine doesn't neet to accelerate it can maintain, lets say, 4000 rpm with no acceleration and the line is spikey.

 

[Nate355RS]

My RPM is fairly steady compared to the log you posted. But looking again at the start of your WOT run your battery voltage is a normal 13.8v. But at the end of the run it drops to 12.6v with most of that voltage drop happening after 3500 RPM. That could certainly could cause some problems with your injectors duty cycle, AFR, and mess with AirflowatioEST.