Commanded lambda problems. Commanding 1.2 and over at WOT

[K44]

Title says it all.

I put a new air box to manifold tube on the car and I noticed this. I then put the stock air tube back on and the problem did not go away.

I cannot figure this out so please help.

[murfie]

From your fuel trims and FDCO areas it looks like a scanner issue. When you switch the command units to Phi instead of lambda it looks correct. The difference matches fuel trims and on DFCO it goes to .85 not 1.177. Make sure you have the latest VCM and update if needed. If that doesnt fix it reach out to support and see if they can correct the units calculation.

For now if you right click the channel and select units Phi, it should correct the numbers. Then use Phi in all your maths, charts, and graphs.

Lambda2 Phi.PNG

[K44]

If I change the WB EQ ratio to Phi it then shows 1.20.

Should I be concerned?

[murfie]

WB EQ ratio looks right in lambda. ITs only the commanded that looks wrong until you switch it to Phi.

Did you update your software to the latest?

[K44]

Yes I did, The first post is with the current beta and I'm posting a second log using the current stable version.

[K44]

I'll use the thumb drive version next.

[K44]

Double

[K44]

It is a scanner issue, I re-loaded version 4.6.3 and it reads correctly.

Thanks Mark, no telling how long it would have taken me to figure this out.

Next question, anyone else have this issue?