Hi All, In many 'Sudden power loss' issues faulty EGR valves found to be the culprit. If the car is driven without the EGR no power loss is seen. Importance of EGR: Pros: 1. The EGR valve helps your car more efficiently and completely burn fuel by recirculating a portion of your exhaust and running it through the combustion process again. 2. vital to your car's emission controls. 3. Reduces compression temperature in cylinder: EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. Exhaust gas is routed back into the combustion chamber because the exhausted air is much hotter than the intake air. EGR works by diluting the N2 and providing gases inert to combustion (CO2 primarily) to act as an absorbent of combustion heat to reduce peak in-cylinder temperatures. Cons: 1..Rough idle and poor acceleration can be caused by a faulty EGR valve. I have following questions: 1. Is it ok to run disconnecting the EGR? 2. Will it cause any harm to the ENGINE ? 3. Any effect in the long run ? Please educate me.