304 in LN106 Hilux- DTC 41

[yoda69]

Idle A/F Ratio vs Coolant is commanding around 14 AFR which is what you have in the second image.
The first image is only 13 runtime so probably has some of the Initial Run A/F ratio offset vs coolant in it so commanded AFR is 13.6.
I agree with Antus that the O2 sensor probably hasn’t warmed up enough in the first image causing the lower reading.
I’m not sure about the calculated VE, it is way off what’s in the table where you’re running. Typically they run a bit rich at idle to smooth them out, hence the commanded AFR of 14.0. If this is set at 14.7 for the idle A/F ratio at operating temp I’m pretty sure it will try and self tune of the O2. I have had problems with this causing surging at idle as it toggles rich/lean on the O2s though.
A narrow band O2 also will show high O2 mv values at anything even slightly rich so 800mv with commanded AFR of 14 is to be expected.

[RalphusGalkinsmelter]

Idle A/F Ratio vs Coolant is commanding around 14 AFR which is what you have in the second image.
The first image is only 13 runtime so probably has some of the Initial Run A/F ratio offset vs coolant in it so commanded AFR is 13.6.
I agree with Antus that the O2 sensor probably hasn’t warmed up enough in the first image causing the lower reading.
I’m not sure about the calculated VE, it is way off what’s in the table where you’re running. Typically they run a bit rich at idle to smooth them out, hence the commanded AFR of 14.0. If this is set at 14.7 for the idle A/F ratio at operating temp I’m pretty sure it will try and self tune of the O2. I have had problems with this causing surging at idle as it toggles rich/lean on the O2s though.
A narrow band O2 also will show high O2 mv values at anything even slightly rich so 800mv with commanded AFR of 14 is to be expected.

I did try and up the Idle AFR so it ran leaner but didnt help for what i could see. When it ran for longer periods it would go into Closed Loop Fuelling for a little, drop back into Open Loop Fuelling and almost stall out. By then my O2 was at 1v and it ran like a bag of shit like it did in the OP. What does the Initial run offset do? Just run it a little richer for a time to aid in warming up to temp?

Im going to read up on the fuelling modes a bit.
Learner plates are on, sorry fellas.

[antus]

calcve needs wideband, so its nonsense data here. narrowband cant see far enough outside stoich to be used for calcve. wideband is just pegged because there is no connection on that pin. You can select the whole ve table and add or subtract to offset the whole lot or tweak the injector flow rate, but dont forget you did it and undo it later or you can make unintended new problems.

[RalphusGalkinsmelter]

Update,
I've installed the wideband 02 and had a few runs to sort out the over-fuelling/VE table. It's getting better but still needs a lot of adjusting and smoothing. During some previous logs I've been getting excited and doing a bit of a power run (sounds mint), but shortly after I am cleaning spark plugs on the side of the road, to get home.

I've since stopped that and just working on cruising and getting it to run smooth during regular driving.

I had a quick question about the INT/ integrator. I read on other threads that it accounts for rich fuelling in attempt to lean it out. I brought it up on my Histogram and it is running at like -17, then zero's out and Target AFR goes all the way to 17.5 but my wideband says I'm down at 12, which might be contributing to the over-fuelling. I'm not sure why that happens if someone could shed some light on it?

I have a DTC for O2 rich fuelling as well. I have an assumption that because I've been fouling plugs with a rich fuel mixture, my O2 sensors might need a clean too? Log and bin attached

[delcowizzid]

You say you have the harness earthed on the firewall is that the ring terminal off the engine harness that normally bolts to the rear lifting bracket bolt if so it needs to be on the engine not the firewall