The only change i've made in my tune is the MAF Frequency Fail so it runs VE only. Since doing that, when I reach a certain point when i'm starting to put more of a load on the engine, it suddenly goes into limp mode & drives like shit! I see P0068 & P0103.
I've attached my current tune & last log. Goes into limp mode around 10:11:13.173.
The log doesn't look too concerning...is it ok to just turn those codes off, or should I be looking into something else?
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set P0068 code to test at max rpm. that should be the one causing your issues.
the p0103 is something you want to have set because its the code that forces the ecu into sd mode. it shouldnt cause a REP mode activation. if its the only code and it continues to do so then set the p0103 to No Error Reported and try again. Try leaving the dtc active first though.
when disabling the maf the p0068 fails automatically when the test runs because the map rises but the signal limit for the maf has been exceeded. this is why it triggers.
honestly i always force the p0068 code to remain off.
As CSSOB said, set your P0068 enable to 8,192. Mine has been set there since 2012.
You may also consider setting your P0101, P0106, and P0121 enable to 231. Just about all aftermarket tunes I've seen have that set there. P0103 should be set to MIL on first error when tuning VE, that way you know for sure the MAF is failed.
Also, you should only be logging for Part Throttle when the car is warmed up and you have been driving it for at least 5 minutes. Otherwise you're just wasting your time and chasing your tail.
Hey Guys, I have the same issue happening, except I just finished up SD tuning and I am turning the MAF back on. This thing runs great until then. I posted the tune with the settings that are now causing the issue, or at least I attempted to. Let me know if it didn't come through? Any suggestions? Maybe I missed a setting, or there is a bigger issue?
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thanks