kangaboy wrote:I'm just going off of the tuner studio gauge, as I don't have one in the car. I thought it may be the AFR sensor because it was being a bit erratic, but then thinking again, if it was the sensor then it shouldn't be doing it when I am not tuning. The AFR readings are coinciding with the way the motor is acting and the drivability of the car, so I feel like it is reading correctly. I could be wrong though.
Maybe the o2 sensor. Even if not tuning the ECU should be trying to maintain your AFR for the tune.
That’s to say that if your AFR reading is off then the ECU could be compensating for a false condition.
Mine was close, but also a point off so it was dumping fuel the opposite of your problem.
I don't have a gauge, but I could procure one if needed.
I was under the impression that if I wasn't autotuning then the readings from the AFR gauge were just readings...I didn't know that it was actually using the readings.
Hmmm...could I test the functionality of the sensor by just unplugging it and letting the motor run off the tune? Or does it not work like that?
A miss will show dead lean,
Fuel that did not burn doesn't use any oxygen, regardless of reason.
You can have raw gasoline pouring out the tailpipe, will still read dead lean if it did not burn.
(initially tried making haiku out of that, gave up)
The WBO2 will not show fat if you are so rich you misfire, which is what it sounds like you may be describing.
You need to calibrate your ms to your wbo2: the presets only get you in the right zip code, sometimes, and if the lambda delay is the default for tuner studio, note that the TunerStudio author has an V8 motor with iron manifolds, with the sensors somewhere between 16&4 inches from the exhaust valves... absolutely wrong for almost any conceivable ACVW exhaust, na, or turbo.
The WBO2 matters as well, my old JAW on ms2 was loads faster than it was on ms3, and much different than the original 14point7 "oem module" setup (raw delay time, probably code related, as the exhaust etc remained ~the same)
Tuner Studios self VE tune (whatever its called now) works absolutely awesome if the wbo2 and its delays are calibrated reasonably right.
I have redone my tune as an exercise many times (testing new firmware or just to watch TS do its thing...) , starting with defaults and having a reasonably good tune in ~20 minutes, just hitting a few freeway on ramps hard, and then a few minutes of cruise at various speeds.
The newer 14point7.com WBO2s have a "self test/cal" sequence on power up, with a spec'd rich and lean signal to calibrate MS to.
I'm still hoping that someone will extend the i2c interface code on ms3 to reads a 14point7 units i2c output directly... right now digital//serial input is only doable via a second box, an i/o expander from jbperformance (same fellow who delivered the initial ms2 sequential code/mods).
Addendum to Newtons first law:
zero vehicles on jackstands, square gets a fresh 090 and 1911, cabby gets a blower.
EZ3.6 Vanagon after that.(mounted, needs everything finished) then Creamsicle.
Piledriver wrote: ↑Fri May 01, 2020 9:17 pm
A miss will show dead lean,
Fuel that did not burn doesn't use any oxygen, regardless of reason.
This is starting to make more sense now. Took the beetle over to my parents today and felt what I KNOW was a misfire. Didn't have the laptop on my, but I'm starting to think this may have been a spark issue the whole time now...
I don't know off the top of my head, I'll pull one in the morning and update. I feel like I measured prior to installing, but can't recall. Do you think something like that can cause issues two years down the road?
I just keep thinking fuel, spark, air. I know air is good, and after the latest update to the fuel system, I feel its delivering, and for spark...I'm not super confident anymore. Not blaming the LS2 Trucks, but more the fact if they are firing.
Wow, that's pretty bad.
I pulled mine this afternoon, and while I have never claimed to be able to read plugs like some people are able to do, these seem fine. Gap is ~0.29inch on all of them. I'll leave it up to an experienced eye though.
I would put new plugs in....they are cheap.
Set them for .024" and try that.
Stripped66 wrote:The point wasn't to argue air temps with the current world record holder, but to dispel the claim that the K03 is wrapped up at 150 HP. It's not.
buguy wrote: ↑Mon May 04, 2020 4:45 pm
I never take plugs out without putting new in. But mine are also a pain. So....
I feel you on that...any simple task that was pre-turbo and EFI has now grown 10 fold
I did get lucky on the plugs, as most of my stuff is still out of the way and reachable.
I'll run up to NAPA and grab some more plugs and gap them accordingly...whether that be .019 or .024
I'm sure the past two years of learning to tune hasn't done those plugs any good.
