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...Diesel Engine EGR Feedback Diesel Exhaust Gas Recirculation (EGR) is different in some respects to petrol engines, but it still works in the same basic way. This Institute of the Motor Industry (IMI) guide to CI, or diesel EGR feedback systems, will help you understand how it works and...

...Mercedes E220 CDI Turbocharger Troubleshooting When Bernard Clarke of Clarke’s Garage, Co. Cavan, was confronted with a suspected faulty Variable Nozzle Turbine (VNT), he eliminated all other possibilities before deciding to replace this costly item. Here is what he did and learne...

...Online Vehicle Manufacturers Information As more and more service information is made available on-line, Damien Curran from the Dublin Institute of Technology (DIT) navigates his way through some of the data and lets you know where you can find it. Technical documentation has always bee...

...Petrol Engine EGR Feedback Exhaust Gas Recirculation (EGR) has been around for many years, but just like any system, it has evolved and variations have been designed by various manufacturers. This Institute of the Motor Industry (IMI) guide to the basic variations of EGR feedback systems,...

...Radiator Electrolysis It can happen very quickly, even in a matter of weeks or even days. A perfectly good radiator can develop pin-hole leaks that are an indicator of possible electrolysis. Harbour Radiator’s Garry O’Brien, explains what to look for and how to prevent it from...

...Testing Piezoelectric Injectors When you squeeze quartz an odd thing happens, it will produce a current. When you apply current to quartz, it will rapidly change shape and stay in that new shape. Piezoelectric injectors uses this characteristic to provide fast, precise control of inject...

...Torque & Power 1 Torque and power are the vital statistics of an engine, but often they are poorly understood or completely mis-understood. Because of our links to England, our European present and a romantic relationship with horses, we also have a confusion of units. The Institute...

...Torque and Power 2 In the March issue of Autobiz, part one of this Tech Tip explained the differences and relationship between torque and power. In this second installment, the Institute of the Motor Industry (IMI) sets out to further examine the nature of torque and power in diesel and p...

...Understanding Electric Parking Brakes Electric parking brakes have been around for more than a few years now, and they are becoming more common. To help you better understand how they work, Autodata offers some details on the basics of the these parking brakes. Electric parking brakes (EP...

...Wheel Speed Sensors Wheel speed sensors are the eyes and ears of the systems that control ABS and ESP. Joe Clarke, of the Dublin Institute of Technology, explains how to diagnose a problem caused by a fault in the wheel speed sensor’s input to the ECU. In the last decade, active v...



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