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 .

  

 ---------------------------------------------------------------------------------------------------

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.

----------------------------------------------------------------------------------------------------------------

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.

------------------------------------------------------------------------------------------------------

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

 ------------------------------------------------------------------------------------------------------------

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 

------------------------------------------------------------------------------------------------------------------

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!

Toyota Landcruiser 200 series, VDJ200R V8 4.5 litre Commonrail 1VD-FTV ECU Flash tuning info...Year 2016

I've gotten a reply from Alpine Lee of Y3 ECU Tuning http://www.y3tuned.com/ with regards to me asking for more info. I was promised more info in a few days time as the team had just returned from another tuning 'marathon' as Alpine likes to call it :-).


My 2008 VDJ200R V8 4.5 litre common rail 1VD-FTV engine had just done 90k+ miles (It's May 24th 2016 Now). It's also received a brand new engine thermostat together with new MAP sensor air filter and associated hoses. The EGR pipe, I've done a full block, which previously would throw CELs after a short drive.



Regrets:
I've done some backyard mods in the past to try and reduce the EGR. My conclusion was not to bother with those mods anymore. Thankfully the holes I've drilled in my air intake were easily reversible with some hard plastics and silicone. The holes drilled in the dual throttles, they were not critical in anyway to affect shutdown vibration or anything else except perhaps in a runaway engine with bad oil leaks coming from damaged turbos. Worst case scenario, engine won't be revving too high with those two 12mm holes.

ECU Flash:
I mentioned that I've asked for a less smoky tune. 840Nm torque is considered a safe tune, without smoke and undesirable EGTs or compromising the autotrans too much according to Y3 ECU Tuning's facebook remarks: https://www.facebook.com/Y3Tuned/photos/?tab=album&album_id=1038654646201864

That 840Nm is a lot!

Torque Limiter Map:
Alpine Lee mentioned that:

 "Generally the torque limiter is the final limit of the engine output , no matter how the boost are tweak, injection quantity been adjusted ,

the final cap engine output still control by this limiter."

Yup, in agreement with Youtube: https://www.youtube.com/watch?v=3Vi4M2qJueQ

More to come...

Toyota Landcruiser 200 series, VDJ200R V8 4.5 litre Commonrail 1VD-FTV 100% complete Diesel EGR delete via ecu flash...

I didn't think it was a simple as that, and yet it was done. The best part was this was not an ECU chip replacement technology but the ultimately desirable one of rewriting the stock ROM on my Toyota ECU!

My earlier dreams of trying to disable the EGR of the VDJ200R V8 4.5 Litre common rail 1VD-FTV has come to pass in possibly the cleanest stock looking way!

I've asked for a conservative tune, my original goal being only to disable the EGR completely. As an engine enthusiast, I know what happens when exhaust gas of the diesel combustion variety gets reintroduced back into the intake manifold. Dirty black crusty crumbs of caked up carbon lining the intake manifold and engine ports from being mixed with engine oil blown in from acceptable leaks from the turbochargers and the PCV breather valve.

Of course you'll have to check with the existing laws for on-the-road use. Off-road use should be ok.

1VD-FTV ECU location in the firewall.

The ECU is located on the front passenger side(Right hand drive car) of the engine on the firewall. Remove the three bolts securing a black plastic electrical box at the bottom before removing the 4 bolts on the ECU flange. The two separate plugs are removed by depressing the plastic arm ends lock tab and rotating the plastic arm towards the edge.

These are the EDUs...no need to remove.

The longer plug is on top. Remember this when reinstalling the ECU back into the slot.

Yes, this ECU can be reflashed without a chip change. Clean and sanitary.

Previous attempt at EGR reduction.

Thought I'll clean the pipe of carbon so that the next time I open it again I'd expect it to remain clean as the EGR reduction to nil should be working without CELs coming on.

Just to be doubly sure I decided to fully block one end of the EGR pipe with a 34mm block plug lest any of the two EGR valves be leaking (Known to be a problem!).

Packed my 1VD-FTV ECU in a sealed plastic bag and couriered it to the professionals.

The wizards Whatsapped me some progress pictures as they worked on the ECU...

 These wires were connected to enable rewriting of the Toyota ROM...

Injector Opening duration. I mentioned earlier in the blog if they tuned with increased injector pressure and their reply was in addition to duration and timing changes! That's very pro in the world of diesel tuning...much like what is available with standalone performance diesel ECUs available from Thailand for your D-Max, Vigos, Tritons, etc....

I especially requested for a conservative (with less smoke at the expense of power) tune, wanting my autotrans to survive longer for my enjoyment!

VGT boost pressure under electronic control could be raised a bit! Stock Toyota shows the 1VD-FTV boost to peak at about 2.1 bar absolute meaning a boost pressure of 1.1 bar subtracting atmospheric pressure deemed at 1 bar. The maps above have raised that to useful high of 1.2-1.6 bar on a good power pull!

Torque limiter...I really do not know what this is until I ask the tuners...My only conjecture was that the tuners had opened up the autotrans portion of the ECU and reprogrammed the stock transmission lock up parameters! Wow! If that is...so until the next blog!

Got the ECU back yesterday...and in the midst of replacing my bad thermostat I also refitted it with the fully blocked EGR pipe. Got it started and it was a beauty!

Car started without any problems and give me time to test if any CELs pop on...

Driving impression: Feels just like a VW V10 TDI Touareg in the torque department. More to come when I've taken it for both a high altitude and long distance drive to the East coast! The boost of the turbo could be heard as one revs the engine gently from idle...yummy!

More to come...