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371 results found for Autobiz

...Combustion and EGR Part 3 In the last part of this EGR series, the Institute of the Motor Industry (IMI) continues looking at the combustion process and exhaust gas recirculation (EGR), along with possible faults. There are four methods of EGR feedback that are used to monitor and contr...

...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...

...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...

...Combustion and EGR In this first part of a series, the Institute of the Motor Industry (IMI) looks at the combustion process and emissions in petrol and diesel engines, the reasons behind the need for exhaust gas recirculation (EGR), EGR operation and what happens when things go wrong. Pe...

...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...

...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...

...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...

...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...

...Diagnostic Solutions has been asked lately, by a number of people, about the new battery technology called “AGM “, so they thought that we would explain a little about it. Firstly, AGM is an abbreviation for Absorbent Glass Mat. As you are aware, until now, lead acid batteries had an e...

...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...



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