How to do mechanical fuel injection in Porsche 911?
Using slight pressure, gently push against the control rack while turning the drive cog clockwise. This is best done if the MFI pump is clamped to a work bench.
What do you need to know about mechanical fuel injection?
For more information, it is recommended that you consult the factory workshop manuals, or if you can find it, the Porsche technical bulletin “4532.20 Check, Measure, Adjust” for the mechanical fuel injection system. The MFI system consists of two main parts, the injection/distribution pump, and the throttle bodies.
What kind of fuel line does a Porsche 911 use?
Fits 911 1969 to 1974 with MFI 90111002100 SIC110021SET SIC-180-030-A Cohline 2122 Braided Fuel Line, 6mm ID- Sold By The Meter. Fits 911 1965-73 Safe for up to E10 Ethanol supplemented fuels.
How does CIS system work on Porsche 911?
The CIS system recirculates the fuel back to the tank, therefore a full tank will act like a large cooling center for the fuel. When you shut the engine off, you might want to try leaving the fuel pump running (turn the key one notch towards starting position) for a minute or two.
What kind of fuel injection does a Porsche 911 use?
Bosch Mechanical Fuel Injection is a splendid, if not inexpensive, performance induction system. It was used on the 911S and 911E from 69 to 73 as well as the 73 Carrera RS. Porsche used various types of MFI on factory racing cars from 67 to 84.
Where is the injection pump on a Porsche 911?
The electric fuel pump located in the front of the car supplies pressurized fuel to the injection/distribution pump. The injection pump is the heart of the system, and is responsible for metering and providing the fuel to each cylinder. The pump itself consists of two main parts, the fuel pump assembly, and the compensating unit.
For more information, it is recommended that you consult the factory workshop manuals, or if you can find it, the Porsche technical bulletin “4532.20 Check, Measure, Adjust” for the mechanical fuel injection system. The MFI system consists of two main parts, the injection/distribution pump, and the throttle bodies.
What causes fuel pump seizure in Porsche 911?
Pump seizure — MFI pumps which have been allowed to stand idle for long periods with oil and fuel in side them often suffer from binding or sticking control racks and gumming up of fuel galleries, as well as possible seizing of internal components of the pump and regulator.