Technical

EGR Valve 7518136

We often receive complaints about this motorized throttle model. The most common complaints are the following:

  • The vehicle gets into recovery mode
  • Incorrect function of the thottle unit
  • Error P0638 occurs “throttle valve control – open circuit”

These defects can not be attributed to a manufacturing defect of the motorized throttle valve, which is built with the quality standard of an original equipment product.

If you experience the above problems it is advisable to firstly perform the following type of testing: Read more »

Parking Sensors

HOFFER recently added to its wide range of sensors, a new category, the parking assistance sensors. This type of sensor is normally mounted on the front and the rear bumpers of vehicles, already as first equipment and operates with radar technology. Read more »

Electronic Control Unit OPEL – ISUZU 7540015/1

We often receive complains about ECU 7540015/1. The complaint is that the ECU stops working and needs replacement.

We would like to clarify that the problem is not due to manufacturing origin. It is instead caused by overstressing the components inside the ECU.

Let us see two of the most frequent cases:

  1. ECU contaminated with diesel fuel: This occurs because this control unit is positioned directly below the injection pump. The pressure regulator on the pump, due to strong thermal stress and high load, loses a plastic part and this causes a leakage. Diesel drops pass into the pressure regulator connector and proceed through the cover of the cable to the control unit, filling it with diesel.
  2. Overheated ECU or subjected to vibrations: again because of its position (in a very hot area of the engine bay), the ECU could be accidentally damaged by overheating. The result will be a failure of the inner welding, causing the ECU to malfunction.

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EGR Valve 88136

We often receive complaints about this motorized throttle model. The most common complaints are the following:

  • The vehicle gets into recovery mode
  • Incorrect function of the thottle unit
  • Error P0638 occurs “throttle valve control – open circuit”

These defects can not be attributed to a manufacturing defect of the motorized throttle valve, which is built with the quality standard of an original equipment product. Read more »

High Pressure Fuel Pump

The high pressure pump (also called “injection pump”) is a mechanical part of the injection system, which has the task of receiving the fuel from the fuel supply circuit and place it under pressure before entering the injectors rail.

Why an injection pump pressurizes the fuel? Because gasoline or diesel cannot just arrive into the combustion chamber simply by gravity, much less to drip. In fact, an injector is designed to “nebulize” and not to sprinkle the fuel; this is because nebulization allows a much more precise and comprehensive spreading of fuel, but this assumes that the fuel was put into pressure. In fact, the highest the pressure the easiest it will be to get precise and sequential injections (not to mention the pre-injections and post-injections). Read more »

EGR Valve. Useful information

We often receive complains regarding EGR valves. The most common problems encountered, are:

  • Engine stalling during acceleration
  • Smoke
  • Mechanical blocking of the EGR valve a few days after installation

In the majority of these cases, the cause of the problem is not related to the EGR valve, but to other components of the exhaust gas recirculation system or even to the air induction system. Read more »

Installing Directions For LPG Injectors

Before replacing the injectors we recommend you to control or replace the following parts:

  • LPG /CNG FILTER (if the filter is dirty or blocked it could cause damage to the injectors) REPLACEMENT IS MANDATORY
  • SPARK PLUG CABLES (if there is voltage leak the ignition will not be proper)
  • SPARK PLUGS (a used spark plug will not offer proper ignition) YOU WILL HAVE TO REPLACE IT
  • LPG / CNG RUBBER HOSES (high temperature, time and oil are irreversibly damaging rubber hoses , creating cracks from which gas could leak – this causes explosion danger)
  • CONNECTORS (please check that the connections are clean and rust free, to improve their condition remove the rust and clean thoroughly)
  • CHECK AND CLEAN PRESSURE REDUCER AND REPLACE THE INTERNAL FILTER (it accumulates dirt and oil) IMPORTANT

Read more »