Issues at 3.5k Datalog help - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

GenRuleAThumb · 07-14-2018, 05:25 PM

So lately i have been having some hesitation at 3.5k. I have pulled multiple data logs and I think this shows whats happening.

JRSC C38 Stock pully
JDL UEL
Full exhaust
91 Octane

https://datazap.me/u/genruleathumb/m...zoom=2647-2839

The data log is quite large but that section should be where i am feeling it and i see timing dropping for no reason..

Tuned by Zach at Delicious

Dont think this is the tune as this has began happening lately.

GenRuleAThumb · 07-14-2018, 05:45 PM

And on this log where i am trying to isolate the issue I can see fuel trim short team as low as -27% with constant throttle pressure where the issue is.

https://datazap.me/u/genruleathumb/m...zoom=2535-3832

GenRuleAThumb · 07-14-2018, 05:49 PM

https://datazap.me/u/genruleathumb/m...zoom=2864-2961

steve99 · 07-14-2018, 08:02 PM

It very difficult to read anthing from deliceius tuning logs as they implement a lot of fueling and timing strategys in custom maps to overide factory ecu functions. also if its a racrom 10 tune ecutek have implemented full time closed loop fueling.

It appears ltft is disabled

best talk to deliceous.

the only thing i can see is high negitive stft is occurring when fuel system status is closed loop. If its racerom 10 then its possible the racerom 10 closed loop is fighting with the factory closed loop. Ive seen this in NA cars on racrom 10, the fix was to disable the racreom 10 ecutek cloed loop function when the factory closed loop is in operation using the engine load.

but very difficult to draw any conclusions unless you had access to tune files

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07-14-2018, 08:02 PM	#4
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,996 Thanks: 1,035 Thanked 4,993 Times in 2,983 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	It very difficult to read anthing from deliceius tuning logs as they implement a lot of fueling and timing strategys in custom maps to overide factory ecu functions. also if its a racrom 10 tune ecutek have implemented full time closed loop fueling. It appears ltft is disabled best talk to deliceous. the only thing i can see is high negitive stft is occurring when fuel system status is closed loop. If its racerom 10 then its possible the racerom 10 closed loop is fighting with the factory closed loop. Ive seen this in NA cars on racrom 10, the fix was to disable the racreom 10 ecutek cloed loop function when the factory closed loop is in operation using the engine load. but very difficult to draw any conclusions unless you had access to tune files

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