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. When the ignition is turned on the DME portion of the relay is engaged.
What is DME relay Porsche 964?
Genuine Porsche DME relay. Will fit all 924S, 944, 964, 968 and 993 vehicles. The relay powers the DME (Digital Motor Electronics – the engine electronics) and the fuel pump. If it fails your engine will not start. Keep this as a spare in your glovebox because the older DME relay is notorius for giving trouble.
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. Contained within the relay are actually two relays which operate in sequence of the other.
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 sensor?
DME sensors capture the data that influences the operation of your engine. The data collected includes the accelerator and throttle position, vehicle speed, air flow, air density and air temperature. This data is then calculated and converted into commands that are sent to the ignition and fuel injection systems.
What is DME in 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.
Where is the DME relay on a Porsche 944?
On the older 944s, the relay is known as the fuel pump relay and is located on the fuse panel under the dash on the driver side. On later 944s and 951s, the relay is located in the fuse /relay panel in the rear left side of the engine compartment close to the windshield and A-pillar.
What is a DME over rev report?
DME stores number of ignitions over 6 ranges of rpm for the 997s and 2 ranges for the 996s and the operating hours of the overrev occurrence. Ignitions are the firings of the spark plugs.
What is a DME control module?
Digital Motor Electronics (DME). The comprehensive management system for your engine: Digital Motor Electronics (DME) controls all key aspects of the engine’s operation, ensuring optimum reliability, maximum performance and the lowest possible fuel consumption and emissions.
How do I know if my DME is bad?
Common Signs of a Faulty BMW DME, ECU, ECM, PME
- Sudden jerking or stopping while shifting gears, even though you maintain your transmission properly.
- Fan running on High.
- Unexplained error codes when all components have been tested or replaced.
