Wideband Tuning first try logfile big cam LS1

[mxhalofan]

Installed a cam in my LS1 238/242 .600 lift
6 Speed car
Headers
removed egr/air
Need help learning how to tune this car. Running really lean on the wideband at idle (I leak some vac to keep the car running/idling)
Low throttle bucking LOL
My O2 voltage looks weird
Any ideas for channels to add?
Should I tune timing first? Add some at idle to help idle?
Add some fuel at idle and try to lower my AFR?
Just baby step around starting with low RPM?
I'm attaching a short idling/up and down the street logfile with wideband data. How should I setup my scanner layout/gauges to display the AFR? widebanddrive1.hpl

[5FDP]

Does it have open headers?

Post the tune as well.

Your o2 sensor aren't really working either, bank 2 is unplugged or has a connection issue.


Make sure that the EGR and AIR is disabled, disable COT too.

If you have no vacuum leaks you can add fuel to the MAF and VE to get the fueling closer to it can idle better.

[mxhalofan]

Black TA cam headers EGR off.hpt
Exhaust has headers, test pipe and muffler
OK Thanks I'll play around with it.
I'll close the vac leak and try another 02 or see if I can figure out the problem

[mxhalofan]

Why does my table have pink and light blue boxes after pasting a table? (screenshot attached, thx)Screenshot (124).png

[mxhalofan]

I think I have a small exhaust leak on the secondary pipe on my headers on that bank 2, would that throw off the 02 signal in the manner in the data? (my logfile in original post?)

[mxhalofan]

ok swapped in some tables and found an unplugged 02 sensor so I have better data now. Car got tables from a 230 cam car and is running better. Still a lot of low throttle bucking, how do I improve road manners?
Attaching todays log and tune file. Thanks for more clues to help me tune this carBlack TA cam headers EGR off.hptday 2 wb.hpl
I really want to graph the AFR on my scanner but google searches come up with addressing AFR error so any insight on that is appreciated. Thanks very much

[Evo8john]

You're going to be hard pressed to eliminate the low throttle/low rpm surging and bucking. My advice is to keep the rpm higher to stay out of those areas. I will try and take a look at the log and tune files this evening, but you're shooting in the dark until you figure out how to log the wideband. Are you trying to do it through the MPVI2? And if so, do you have the Pro Features enabled?

[kingtal0n]

Why does my table have pink and light blue boxes after pasting a table? (screenshot attached, thx)Screenshot (124).png

pink to red means the changes are positive compared to what the file loaded with

blue to dark blue means the current changes are less than what the file loaded with

so if the file came in with the number 5.0 and you make it 4.9 it will turn blueish. And if you make the other five nearby from 5 to 3 it will become darker blue than the 4.9 because the amplitude depression is deeper.

Keep the easy ones coming its all im good for =P

[Boost]

You're going to be hard pressed to eliminate the low throttle/low rpm surging and bucking. My advice is to keep the rpm higher to stay out of those areas. I will try and take a look at the log and tune files this evening, but you're shooting in the dark until you figure out how to log the wideband. Are you trying to do it through the MPVI2? And if so, do you have the Pro Features enabled?

this

[mxhalofan]

oh cool thanks for the responses. I'm learning and enjoying this stuff
Car is running better after warmed up and driven but the cold start problem is car can barely move itself and will die
Cold idle and low RPM power (below 2k RPM ish) is really lacking. Can't drive it until it's warmed up or it'll stall and have to have the thottle feathered
Clutch pulls really smooth once the car is warmed up so I've been tweaking some low RPM stuff but feel like I need to read the data better
I am datalogging wideband AFR (graphed too)
Does anyone graph engine coolant temp?
I'm assuming the STFT and LTFT will keep learning and adjusting . I need to read up on these.
Can anyone look at my scanner layout and provide tips?
I'll attach a short data log from today and my tune file if anyone wants to have a look. (I copied some tables from a 230 cam car file from the tune repository here and adjusted some low RPM fueling and timing)Black TA cam headers EGR off.hptfridaylog.hpl
My STFT are pulling fuel abotu 10%, but when I pop the throttle my AFR does a lean spike to 20. I'm looking over the data and data logging every day and adjusting some values but need to learn to read the 02 data and fuel trims, any advice is appreciated. Thanks a lot guys.