EGR cycle delete on my Mitsubishi Montero using a 4.7K Ohm resistor

Any side effects of this on the car? Yes. Its smoking less now. A error popped-up once for low intake temperature. I cleared that error with the Torque App and did not see it again.

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The EGR cycle in the Montero is activated at idle and starts reducing with part throttle input and gets completely deactivated at full throttle. It also gets deactivated when the Intake temperature is too cold. So the plan is to cheat the EGR to think that its too cold so that the EGR cycle does not happen.

Why do this?
The Engine Blow-by gases are recirculated into the intake and the EGR also recirculates exhaust gases with soot into the intake. This is a deadly combination and will choke the intake manifold (see my next post for proof), affecting regular engine operation. This needs to be cleaned regularly and I did not want to do this. So i have disabled it in the car.

How to do this?
We add a 4.7 KOhm resistor in one specific (Black + Blue) wire in the MAF sensor wiring loom so that the ECU reads lower temperature than it actually is.

Wont this resistor mod affect regular engine operation?
No, because there are two different sensors for temperature and we will only modify the one specifically used for EGR cycle. See attached image from TorquePro OBD diagnostics app.

Before this mod, the EGR was 69% at idle and was reducing if Accelerator pedal is more than 10%.

With the resistor mod, the InletAirTemp is constant negative 2 deg Celcius. The EGR is also constant at 0. Note the second intake temperature gauge displaying the correct value.

Any side effects of this on the car?
Yes. Its smoking less now. A error popped-up once for low intake temperature. I cleared that error with the Torque App and did not see it again. So i consider this mod to be a success!

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