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Air On Board EGR Blanking Module

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  • #16
    I just ordered one for my Prado 2016 2.8 ltr diesel hope there is instruction included

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    • #17
      Originally posted by teddy View Post
      I just ordered one for my Prado 2016 2.8 ltr diesel hope there is instruction included
      Instructions are included, the plug is hard to reach but it can be done. Does anyone have anymore feedback with their setup? No issues or adverse affects?

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      • #18
        I have installed one in my 120 Prado and it seems to working ok but....

        The EGR system on the 120 and I suspect later versions appears to have two functions. The exhaust gas comes from the exhaust port
        and then travels through one of the passages of the EGR cooler, the cooler has two passages, one through the cooler fins and one that
        by passes the fins. At the outlet side of the cooler is a butterfly valve assembly controlled by an actuator from the engine ECU. In one
        position it opens the cooled side of the cooler, in the other it opens the bypass side. The gas then flows through the EGR valve either
        into the inlet manifold or out of it depending on what is going on at the time.

        It has been suggested in the past that the bypass side is used to dump excess turbo pressure, ie if engine is under light loads the EGR
        valve is open and exhaust gas flows through the cooler side of the cooler and via the open EGR valve into the motor. Under high engine
        loads the EGR valve is closed, if the engine revs suddenly drop, ie trans changes gear or you lift your foot of the throttle the engine ingests
        less air, the turbo which was pumping air into the engine at pressure is suddenly producing to much volume and the pressure rises in
        the inlet manifold. This is not good for the Turbo as it increases the load on it, to overcome this it appears the Engine ECU opens the
        EGR valve and and operates the actuator on the EGR cooler to open the bypass side to allow over boost to easily exit via the EGR vale,
        EGR cooler and exhaust system.

        Before purchasing the cable I sent an email to Diesel boss and asked them if the cable monitors the airflow into the engine and simulates the
        EGR valve operation as I couldn't see a plug for the MAF sensor, ie asking how do I know the unit actually does something and it not just straight
        through connections they respond with "when you install the unit you will see the EGR valve is disconnected and therefore can't operate" which
        is what I would have expected so all good from that perspective. I recently sent them an email asking about excess turbo pressure dumping of
        thereof and their response was "Excess boost pressure is still vented as normal through the EGR valve as per factory settings" well obviously this
        s not the case as the EGR valve is disconnected!

        I have asked them how can excess boost be vented through the EGR valve when it is disconnected but haven't received a reply.

        Where does this leave one, well first off it needs others with the unit to contact the suppliers of this device and ask them how is excess turbo boost
        handled if the EGR valve is disconnected?

        The answer is it isn't so what does that mean, truly I don't know, the common consensus is diesel motors don't need a dump system as they don't
        have a throttle valve therefore the engine will consume any over boost, this point I'm not so sure of, with a slow revving big diesel maybe, with a high
        revving small diesel it maybe different, ie engine at 5000RPM and max boost and the transmission drops the revs 1500RPM, you have a turbo
        pumping high volumes of air at say 4PSI into a motor that was doing 5000RPM and now it is suddenly spinning at 13500RPM the motor is not
        going to consume the extra volume of air as it can't, which is probably why Toyota have put in a dump mechanism.

        Interesting aspects though to consider, the inlet manifold is a lot larger than the EGR pipe, how much volume of air can actually be dumped via
        the pipe, maybe enough to prevent excess load on the turbo or perhaps prevent turbo lag but then others indicate turbo lag is less with module
        fitted? EGR plates with 7mm hole are popular, how much excess boost can be dumped through a 7mm hole, maybe a littles better than none?

        How often does excess turbo boost need to be dumped?

        As an aside, I was under the car a couple of days ago after doing a 300Km or so test drive after replacing the injectors, water pump, timing belt
        etc, and coincidentally fitting the delete cable checking for any oil leaks etc. I spotted some rusty bolts and thought what's going there. On investigating
        I found the rusty bolts where on the turbo and exhaust which is to be expected. What I also found though was some oil weeping at the bottom of where
        one of the turbo control motors is on the inlet side of the turbo. I have never noticed any oil around that area before but to be fair I haven't gone looking
        for it either so may be new may be old. Could be just oil from the PVC draining down, nothing under the car so you wouldn't notice it if you didn't go
        looking for it. Be interested to know if others have seepage around that area before fitting the cable?
        HKB Electronics, manufacturer of the Alternator Voltage Booster, Silver 2008 D4D,Lifted,Underbody protection, Alternator Voltage Booster, Tiger Z winch, Lightforce DL, Air Horns, Tanami Drawers, Drop down fridge slide, Outback cargo barriers, Rotronics dual Battery system, Polaris GPS, HF/UHF/VHF, Radio speaker combiner, Long ranger water tank, Diff breathers, Inverter, Snorkel and others

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        • #19
          Could someone possibly post up the install instructions for the 2.8 please?
          Id like to see what involved and the locations of plugs etc prior to ordering.
          TIA
          Marc, 2003 Grande V6, Just a Bit of Stuff Done..........Work in progress.
          [url=http://www.pradopoint.com/showthread.php?21168-1Coolbanana-s-Grande-Build-Up]1Coolbanana's rig build up[/url]

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          • #20
            Hello Everyone

            I’ve been using Bush Electronics EGR Bypass Module about 7 years on my 2015 Prado Diesel 3ltr, later on the year came the 2.8 diesel, anyway back on topic I’ve being useing his module for about 7 Years, I consider him to be the best in the industry as he invented this module from the beginning every body is playing catch up, why I think it is the best because it comes with several options like you can mount it under the bonnet or upgrade to the mounting version for inside the cabin which I have, you can switch back and forth to turn the module on or off, you also can control trim your fuel (Diesel) with a adjustable nob to suit your conditions whether normal everyday driving or off road or towing a boat or trailer to get the best fuel economy,

            to date this module has being working grate I have no complaints come to think of it I haven’t heard any complaints from anyone, besides you don’t have take it off every time you go in for a service because you can switch it on or off from your cabin, (I mounted mine in the glove bob) I have been around Australia towing caravan boats etc it hasn’t let me down yet, I would of being lost with out it

            im sure a lot of other Prado members here can testify how good Ozbush Electronics module really works and works well, I’m not trying to persuade anyone but if you want more control of your what ever your usage maybe take a look at there website http://ozbushelectronics.com.au sometimes he isn’t able to answer the phone leave him a message and he will get back to you or email him, I’m not one to bullshit people as I tell it how it is, as other members will tell ya, As Molly Meldrum says (do yourself a favour) give Ozbush some consideration you won’t be disappointed,

            one more thing the gentleman is Chinese his English is a ok, his back ground in electronics will astound you, I beleive he design a lot of ecu’s for car manufacturers in the industry that alone tells me he now’s a lot more than a lot of diesel Fitters ever would how do I know this because I’ve I am a Diesel fitter for over 40lus years and he blew my mine away as to what he knows.

            Peace and Prosper to everyone ✌️✌️

            http://ozbushelectronics.com.au

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            • #21
              Just as an update with regards to the AOB delete module, the air inlet temp seems to be affected by this module.
              As i installed the unit during winter i never noticed that it was affecting/altering the air inlet temp. Mine would max out reading at 16°c air inlet temp even though it was warmer outside, im not 100% sure if this affects anything else other than the egr or it is possibly tricking the ecu to stay in closed loop/ cold start tune of the ecu.
              i dont imagine driving in a 35°c day whilst your vehicle is thinking the air inlet temp it is getting is 16°c and fueling accordingly is a good idea.
              Mind you im not 100% sure what the air inlet temp affects, i can only see a limited number of outputs from the obd2.

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