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Hi, sometimes when I do a WOT run the lambda reads at 0.80-0.82, which is rich for my N/A setup. Then 5 minutes later it will read at the commanded 0.87-0.88.
What is the reason for this? Does heat...

I did the conversion, and problem fixed so far! Nice smooth driving on the highway. I've attached my table. It wont let me edit the axis numbers so I left them as they are up to 175kPa and basically...

Recently had a mantic twin plate clutch and flywheel fitted. Before this my 12 degree overlap cam had perfect drive ability at low speeds. Now it?s very temperamental between pressing the clutch...

Thanks for everyone's help. I haven't had the car with me this week so when I pick it up I'll re-write the tune with 2 bar OS.

In the meantime, I've looked at other tables in the tune, and there's...

I'm assuming IVT is intake valve temperature in open loop? When in closed loop using o2 sensors, I don't understand how IVT would have any influence?
It would only have an influence when you start...

That's correct, it's a fuel and spark spike. It's funny you say that, my other car with the exact same setup also did it too (that was auto)! I always thought it was a damaged converter lockup clutch...

Thanks for the responses. The car is N/A and the MAF is removed and disabled. Fueling is tuned purely off VVE.
I took your advice and smoothed out the VVE and made the transitions between columns...

It does look like there are 100-200 differences between the VVE columns up to 1800rpm. You think this would cause the fuel increase / spark drop jerk?
When it was open loop, the wideband did show...

The fuel trims show it's actually rich (removing fuel). I don't think it's the VVE as I've tried different fuel amounts and I've tried running it in open loop too.

I'm hoping someone can point me in the right direction. I've been trying to locate this random jerk that feels like a misfire when cruising on the highway at 1200-2200rpm. It's happened ever since...

Just saw your log at idle. My above post confirms too much idle fuel. You can see how the LTFTs sky rocket towards the end of the log.

But something doesn't look right in the VVE table. The idle...

I have a similar cam. For the startup issue, it appears there is too much fuel for that cam. Try 80 in the cranking VE. Also 1100-1200 VE at idle seems excessive, try lowering that area by 10%
And...

I used to be a big believer on n/a tuning using o2 sensors and aiming for 900 voltage at wot. It wasn't until I installed a wideband and realized my 900 voltage was actually running at 0.95-0.98...

The a/c was off at that moment. Should I still look into that?

Occasionally when cruising on the highway at 1800rpm, the engine will suddenly jerk for a second. When I scanned it the spark went from 40 down to 8 then back to 40 which explains it. It is not fuel...

You mean if o2 sensors are not working?

The min airflow tables are the same between park idle and in gear. So it sounds like there's either too much fuel for that frequency or converter load up.
Yes the o2 sensors are concerning. I just...

Hi, my apologies it was a silly question. I didn't realize there was a PID channel for MAF Hz.
Anyway idle is about 3500hz in park and 4000hz in gear. When i decrease the g/s values at these...

Hi, generally what would the MAF idle frequency be with a small 224/232 cam? Does 1500Hz sound about right?
Trying to work out which Hz numbers to lower below 1000rpm as it's running rich ?

That's the data I have so I'll have to trust it?
The car runs fine apart from the issue mentioned at the start of the thread and sometimes it has a hard time finding a steady idle after a throttle...

Not sure this is the data attached. I took my time and converted everything to metric. If it looks higher than normal wouldn't the car run lean?

So I changed those 2 things we discussed and it appears to have fixed it. Refer attached. I'm curious to know more about that index enrich table. Why don't other e67 owners have that issue? And why...

Ok I'll try the hi di enrich and cat over temp. I had to change the fuel density because the cluster fuel economy was showing higher by about 10% then what it was actually using.
The injectors are...

It appears to have started after installing headers.

Thanks for clarifying that.
Take a look at my cold start log, in the eq commanded channel you can see it starts at 0.8 lambda then drops to 0.56 and almost stalls. Why is it commanding that? No...