Tuner Info Part 2 ECU Flash Toyota Landcruiser 200 series, VDJ200R V8 4.5 litre Commonrail 1VD-FTV Diesel EGR Blank/Delete/Reduce...

Fair warning given:

The following is only recommended reading for the motor performance tuning enthusiasts among my readers...It may not make much sense otherwise!




As per my lastest email interaction with Y3 ECU Tuning of Y3Tuned. Alpine Lee, with whom I've been corresponding had kindly agreed to give me more 'inside info' as to what was done in the ecu flash tune. Truck being a 2008 Toyota Landcruiser 200 series with the twin-turbo 1VD-FTV V8 common rail diesel engine.


Here goes....

Hi Albert , 

Kindly refer to the explanation ,apologize for the delay .

1) Pilot Injection Table

- What are the X(0-11),Y(0-16) and Z(4000+) units in the map? I understand the pilot injection to be necessary to reduce knocking and allow a smoother combustion burn post pilot, especially at lower rpm.

A: The X is Rail pressure while the  Y is the relative load of the engine ,  while Z is the duration as same as main injection , the scale located in other address of the firmware , as the scale wise I dint define it cause it’s a little time consuming to point to other address for the scale .

- What is your rationale in modifying the parameters?

- To shorten or lengthen?

- To adjust for a longer post pilot injection?

I had prolong the Pilot for high load to in-pair with the increased main injection, else the noise or smoke may be occurred in higher load, in the other hand it will slightly contribute additional power as well.

Btw, additional pilot inj in low load will create more engine noise,

 Eg. You will found Piggy back on vehicle has some pinging sound during idle .

  

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2) EGR Air Request Map

- What are the units along the 3-axis? This one is fairly straight forward to understand.

- The air request is the deviation of air flow reading for EGR kickin state , just set it to 0 , the EGR detection by Air flow will be disabled.

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3) 4 x EGR duty map

- A short description will suffice thanks.

 -  those Map are the EGR valve duty cycle open loop map including the correction value according to ATM Pressure  , Engine coolant temp,  intake air temp.

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4) Searching of ECU Map via 2D mode

- A short description will suffice thanks.

 - The ECU firmware is a bunch of binary / hex code , we need to look for the 2D pattern for the hex value to determine where is the injector duration , turbo boost ,boost limiter , torque limiter etc

 eg : https://www.youtube.com/watch?v=m9zBF7dRYMU

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5) EGR related error code been switched off...

- I have used an old PC disassembler "Sourcer" in the late 80s to disassemble installer programs to 8086 'assembly language' to enable one to modify the installation to proceed bypassing the password requirements, the reassemble and run it. Your hex dump, to understand it, you have a disassembler? Haha just remembering the old hacking days!

- All error code in Toyota firmware can be found easily by searching the Error code in Hexa mode, the error block is leading by the error code and follow by the error switch , error state , error de-bouncing value etc.. Set it to 0 will permanently switched off  the particular error code 

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There you have it!...Some insider info on an ecu flash to remove EGR and improve performance of the very capable 2008 Landcruiser.

All thanks goes to Alpine Lee who has been generous enough to divulge information of this nature to us customers, like many other good tuners also. I personally believe his generosity will only serve to improve knowledge and understanding of us enthusiasts more....translates to asking for the right tune and freedom from misunderstandings. This can only be a growing market! Cheers all!