🔥 An EGR delete will cause your engine to overheat!? 🔥 Watch as we answer this question. The EGR is active during low to moderate throttle conditions to reduce emissions by recirculating exhaust gases and lowering combustion temperatures. But, at wide open throttle such as on the motorway, hill climbs and towing heavy loads the engine demands maximum power so the EGR system shuts off, for two main reasons; 1. Recirculating exhaust gases during high power demand would reduce oxygen availability