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...Technical Information Preheating relays General Preheating relays provide switching and control of glow plugs. Activation and operation duration are mostly influenced by the position of the ignition switch or activity of the door lock and a temperature sensor. Funct...

...Renewal of the injector valves, all vehicle makes Important note for fitting new injection valves. Through storage, it is possible that in some rare cases, the dry injector valve sticks. This can lead to engine running problems. To prevent this t he injectors should be checked...

...VW TDI engine 66 / 81 KW Needle motion sensor If faults such as sporadic misfire, sudden loss of power at high engine speed or high vehicle speed are apparent, the cause can be a faulty needle motion sensor. For the exact fault diagnosis the fault memory should be read out wi...

...VW TDI engine 66 / 81 KW (90 / 110 HP) Airflow sensor A frequent problem with this TDI engine is a faulty mass airflow sensor. This fault does not cause the MIL lamp to illuminate every time. Often it takes time for the driver to notice the car is not running correctly. Low po...

...Technical Information Coolant level sensor General Coolant level sensors are fitted into the expansion tank. It checks the minimum level in the tank to prevent an overheated engine through water shortage. Function The coolant level sensor is a magnet which is...

...Alfa Romeo 156 Pressure switch with four circuit stages The original air-conditioning of the Alfa 156 has, unlike a lot of other systems, a pressure switch with four instead of three circuit stages. If the pressure falls under 2,5 bar or rises above 30 bar, the compressor will...

...Technical Information Ignition module (Trigger box) General The ignition module contains the closed -loop primary current control circuit and the dwell-angle control. They are built with hybrid technology. This has the benefit that they can be built together with the igniti...

...Opel Omega B 2.5 Liter Turbo Diesel From model year `98 Modification to the compressor and expansion valve With the engine code change from model year '98(X25DT in place of 25DT) the compressor has also changed. The Denso 7SB16 replaces the Denso 6CA17. Consequently the...

...Opel Vectra A/Astra F/Calibra Unsatisfactory cooling of original systems If customers find fault with the cooling performance of the air -conditioning system of a Vectra A, Astra F or Calibra, the refrigerant charge and the\ expansion valve should be the first check carried o...

...Opel Vectra B Different compressors The Vectra B has various Harrison and Denso compressors fitted. These can be different despite same vehicle types (e.g. belt pulley alignment). To be sure that the ordered part is the right one, order only using the original part number!...



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