what is this log telling you?

[JOHNGEAR]

hi, looking at this log, is it telling me that i have a bad o2 sensor or injectors(one side) or a intake leak? thanks

[5.7ute]

I would switch the o2 sensors over & do another log. That would be the easy way to distinguish between a cooked sensor or mechanical issue.
I would tend towards a bad injector if the problem didnt switch banks with the sensor. An airleak would max the trims to get it reading that rich, & your trims are 0.
Might be worth logging STFT as well.

[JOHNGEAR]

good idea, thank you very much

[5.7ute]

No worries. Post the log when you have switched the sensors.

[JOHNGEAR]

So i changed my o2 sensors(did not swap them)back to the ac delco from bosch and here is my tune and log.

[5.7ute]

You must be cold where you are. We are getting 43deg c compared to your -5.
something odd going on the way none of those sensors are switching. I will have a look through your tune file & see if I can find anything there.

[JOHNGEAR]

yes it is cold here and saturday it will be -30c, thanks for all input you may offer.
a bit on this motor set up, vortech v1- 2.87 pulley
97 vortec 5.7
comp cams #08-301-8
#26918
#787
#1417
#648
upgraded spider injectors
i think that i will increase my pulley so to drop some boost(too much for this injector set-up)and i think that is it.

[joecar]

Set B3801 to Enable and B4205 to stock (something like 90-100°F).

[JOHNGEAR]

thank you but i should tell that this is a speed density tune,will these changes then be correct?

[5.7ute]

thank you but i should tell that this is a speed density tune,will these changes then be correct?

Those changes will enable the trims, allowing closed loop fuelling. However, since this is a COS, semi open loop should be enabled anyway as you are commanding stoich in B3647. Something is preventing the o2 sensors from switching, either mechanical from two dead or uncompatible sensors, or a tune issue. I will get back to you if I find something in the tune.