Stage 2: Toyota Landcruiser 200 series, VDJ200R V8 4.5 litre Commonrail 1VD-FTV Diesel EGR Blank/Delete/Reduce

Been reading forums all over, especially the land down under and of today nobody has successfully fully blanked the Toyota 1VD-FTV V8 diesel's EGR completely without causing it to throw a CEL(Check Engine Light)! In this case the 4Lo, Engine, Traction off, Check VSC Warning+++ altogether.

Toyota 1VD-FTV engine. Only visible externals mods are the blue push-in air hoses.

Let me be very clear, my car was a 2008 registered sample and Toyota Intelligent Tester II tells me mine was "07 MY".

My first full blank with no other mods caused CELs as mentioned.
Investigating with the Toyota Intelligent Tester II shows a P0401 Exhaust EGR Flow Insufficient.

By the way, if you're a home mechanic without the Intelligent Tester II be assured you can reset the engine ecu by disconnecting the two batteries for 5 minutes to clear the CELs.

There's talk of an electronic/digital device to cheat the Toyota ecu/ecm but I've not heard further and am left without a clue as to who makes one.

The EGR blanks are usually made with a fully blanked gasket piece( eBay has plenty) installed to cover the EGR pipe feeding into the siamesed intake collector behind the two throttle bodies.

Toyota 1VD-FTV EGR feed pipe under the intercooler.

Of course eBay also sells the blanking plate with a 10mm hole drilled in the middle. This one apparently works without throwing any CEL and yet returns "performance" of the forum variety! I've not tried it but had mine made from a 34mm engine block "freeze" plug that I hammered squarely into one end(nearer the radiator!) of the EGR pipe. I did have to drill a 9mm hole.

Old 9mm hole 34mm block freeze plug pried from the EGR pipe to make way for a new one.

Apparently drilling any smaller diameter holes will throw CELs. Mine didn't at 9mm for the longest time I could remember...2 years maybe.


Anyway this post came about because I got curious for a smaller diameter hole blank!

Let me just give a list of things I've done:

1) Drilled a 9mm hole in each of the throttle plates of the dual throttle bodies.

Toyota 1VD-FTV Throttle body. There's two of these.

2) Plugged the factory MAP sensor feed hole of the siamesed intake collector behind the throttles bodies.

3) Fed the MAP sensor pressure from before the throttle by drilling and tapping the intercooler (do flush it with some petrol and air):

A 4mm push-in air-hose fitting with M4x0.8 threaded end fitted to intercooler. Factory oil-separator reused.

4) Reduce MAF(Mass airflow) readings by bypassing the airflow with 12mm push-in fittings and air hoses. Two in my instance.

12mm push-in air hoses from the airfilter box to...

To bypass the MAF!...

As to the theory of the above...later!

I then drilled the blanking plug hole to 6.5mm diameter...voila! no CEL!....so far! and performance was "definitely"(by the seat-of-the-pants feel) better than stock. Response was instantaneous and feel of the torque pull was "utterly" satisfying :O!

By the way, a 10mm hole gives an area of 25xPi = 79(sq.mm) and a 6.5mm hole gives an area of less than half at 33(sq.mm). That should somewhat reduce EGR rate effectively entering the intake system by a bit.

When I get tired of my new found performance :-) I will then try to reduce the diameter of the EGR bleed hole further...perhaps to 4mm diameter.

This post is Stage 2 with Stage 1 being the 9mm diameter hole I have tried before.

Enjoy and do check back just in case I've decided to try to reduce further the EGR rate!