Transport Delays

[JFiorito]

Hey guys,

I recently discovered that you can log your O2 transport delay. I have 1 7/8" catted LTH and am currently failing my Catalyst, O2 Sensor, and Heated O2 Sensor readiness checks (If I turn off P420 and 430 I will pass the Catalyst check, but I am trying to see if I can leave them on). I've read you need to adjust your transport delays when you get headers. Most people say you should increase them, but I've read a few posts saying you should decrease them. Anyway, I made a graph here to match the transport delay table. My most recent log is quite a bit off of my existing table. Would this be as simple as copying the logged graph in to my table?

Transport Delays.PNG

[Relentless]

Normally I see these Logged graphs I Paste special>Multiply by % or Paste special>Multiply By Half %. What PID's are used to make that Graph?

[paulsmithsr]

Yes copy and paste

[JFiorito]

Normally I see these Logged graphs I Paste special>Multiply by % or Paste special>Multiply By Half %. What PID's are used to make that Graph?

I'm using "O2 Transport Delay Total"

transport delay graph.PNG

[paulsmithsr]

That’s what I do —u can left or right

[Relentless]

I'm using "O2 Transport Delay Total"

transport delay graph.PNG

So does that measure the transport delay used? or what it should be?

[JFiorito]

So does that measure the transport delay used? or what it should be?

Exactly I'm not sure. It seems too simple to just copy and paste that to me. I would guess that adjusting the table would affect how these turn out. If it just knew the transport delays then why would it need a table for it?

[bbrooks98]

Exactly I'm not sure. It seems too simple to just copy and paste that to me. I would guess that adjusting the table would affect how these turn out. If it just knew the transport delays then why would it need a table for it?

I think the theory is that the ECM uses adaptive strategy to automatically adjust the transport delay. So by you logging the final value you can then copy and paste that value into the table and it "should" make the adaptive not need to correct.