Skoda Octavia II (1Z3) – ECU remap v6.xx

I still have issues with engine overheating despite improved cooling. I am starting to understand why manufacturer keeps high AFR. In theory 14.5:1 stoichiometric ratio is optimal for diesel fuel but in reality it smokes and overheats engine. This is history of version 6 series of ECU remap.

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SUMMARY

• the more I know the more I return to original factory calibration !!!
• new calculation of calibration data
• better heat management of engine
• injection timing to factory default
• intensive testing in mountains
• slowly understanding that boost doesn’t matter
• studying over and over again Bosch 2000 pages ECU manual
• experimenting with FMA a Lambda full load regulation

DOWNLOAD VCDS LOGS FROM FIELD TESTING

Changes

• everything recalculated (v6.00)
• Torque Limiter and Boost limiter changed
• everything recalculated due lack of torque (v6.10)
• Torque Limiter and Boost limiter changed based on new calculation
• SOI to factory default (v6.11)
• Lambda maps increased to 1.241/18:1 @ 2500-3000 rpm; 1.379/20:1 @ 4250 rpm (v6.12)
• N75 maps optimized for increased boost (v6.20)
• experimenting with MAF smoke limiter (v6.21)
• MAF Smoke limiter doesn’t work smoothly, returned to factory MAP Smoke limiter (v6.22)
• MAP Smoke Limiter – increased AFR to 18-19:1 . It looks like this is the only limiter that reliably works on Bosch EDC16U34 ECU (v6.23)
• torque to IQ mapping interpolated for increased fueling (v6.24)
• Torque Limiter increased
• MAP temp correction interpolated for new values (v6.25)
• FMA switched off (v6.251)
• FMA switched on – no changes (v6.252)
• Lambda full load regulation switched on, Lambda maps changed to 18-20:1 AFR (v6.253)
• Lambda full load regulation switched off, only Torque Limiter and Boost Limiter works reliably as Smoke Limiter (v6.26)

Calculation of calibration data for HR v6.xx
(CLICK TO ENLARGE OR RIGHT CLICK VIEW ORIGINAL IMAGE)

Vision

• reliable and precise fuel mixture control because Lambda or MAF smoke limiters do not work on this ECU !
• more safe torque
• transient response for hillclimbs and rally style driving