Hi,

So after cracking a piston in my 07 hilux, and a full rebuild Inc fuel system and turbo ect.

I found a crack in the egr cooler, after investigating a boost leak, leaking exhaust gas.

So needing a quick remedy, I installed an egr blanking plate, complete block no hole. I have also removed the throttle butterfly to prevent air being drawn in from cracked pipe.

I have noticed that when the accelerator pedal is released, there is boost coming out of crack in pipe , meaning the egr valve acts as a boost dump?

What I need to know is, when the ecu turns on the egr valve to commence recurculation, the engine will loose boost out the crack in the egr cooler, will this negativity affect the engine performance as I have removed the throttle butterfly? and suspect that boost would have been lost under theese conditions anyway?

Cheers.