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Where is the DME relay on a Porsche 911?
On the 84 to 89 911s, the DME relay is located under the left front seat directly adjacent to the DME box. On the 90 and up 911s, it is mounted in the fuse box.
What is DME relay?
The DME relay is actually two relays in one. One relay controls the car’s DME [computer] and the other controls the fuel pump. The purpose of this relay is to prevent the fuel pump from continuing to operate in the event of an accident. This provides power to the car’s DME which then waits to sense engine rotation.
Where is the relay fuel?
Most fuel-pump relay units are located under the dashboard near the steering column. In some cases, the unit is located in the area where the steering column is mounted or near the engine’s firewall.
What is a Porsche DME report?
A DME report is generated by using the proper test equipment to read out any engine faults that have been stored in the DME or ECU memory. This is an important part of the pre-purchase inspection (PPI). Take a look at your PPI and it might have a section for engine faults or codes – that would be the DME report.
What is a DME on Porsche?
Digital Motor Electronics (DME) is a microprocessor based system that controls the ignition, fuel injection, oxygen sensor, and numerous ancillary functions of an automobile. DME can fine-tune the engine hundreds of times a second to provide maximum performance and efficiency.
What is DME in automotive?
Digital Motor Electronics (DME) is a microprocessor based system that controls the ignition, fuel injection, oxygen sensor, and numerous ancillary functions of an automobile. In the automotive industry, DME is often referred to as the Engine Control Unit (ECU), under the heading of Electronic Engine Management Systems.
Which faulty ignition component can result in a no start condition?
Car not starting: Another symptom of a faulty ignition relay is a no power condition. If the relay fails it will cut off power to fuel pump and ignition system, which will result in a no power, and therefore no start condition.
What are over revs?
An over rev is exactly what is says it is. It is one or many engine revolutions over or above the maximum number of engine revolutions per minute the engine manufacturer has deemed safe. They typically occur in cars that have manual transmissions on down shifts when the road speed and gear tooth ratio are not in sync.
How is a DME relay used in a car?
It is used to control the switched-power circuit for the DME module, the fuel injectors and the fuel pump. This particular type of relay is commonly used in vehicles manufactured by Porsche and BMW.
What does a digital motor electronics relay do?
A digital motor electronics relay is nothing more than two relays built into one case — it has two coils and two switches. It is used to control the switched-power circuit for the DME module, the fuel injectors and the fuel pump.
What kind of relay is used for fuel pump?
A digital motor electronics relay is nothing more than two relays built into one case — it has two coils and two switches. It is used to control the switched-power circuit for the DME module, the fuel injectors and the fuel pump. This particular type of relay is commonly used in vehicles manufactured by Porsche and BMW. The Two Circuits
What does proword relay mean on a radio?
The proword RELAY used alone indicates that the station called is to redirect the message to all addressees.