How is the fuel regulator connected to the fuel rail?
The cylindrical metallic object connected to the fuel rail is the fuel pressure regulator, which is the last component of the engine that is supplied with fuel. It has a vacuum hose attached to it. The vacuum in the regulator provides the extra pressure against the spring.
How does the control pin in the fuel distributor work?
The control pin in the fuel distributor moves according to how much air deflects the air sensor plate and is also affected by control pressure. Control pressure acts on the top of the control pin, cold control pressure is low (14 psi depending on model) which lessens the resistance of the air sensor plate to rise.
Where is the fuel pressure regulator on the K-Jetronic?
The lower connection hose is attached to the pipe that is connected to the K-Jetronic fuel distributor control input. There is also a 12V power socket on the top of the CPR. It is connected to a bimetal plate heater that is located inside and used to regulate the fuel pressure. On the photo 2 you can see the reverse side of the regulator.
How can I check the pressure in the fuel regulator?
Mostly, the diaphragm develops a leakage and the fuel enters the vacuum hose. This may lead to various kinds of problems in the engine. The pressure in the regulator can be checked by pinching the fuel return line.
The control pin in the fuel distributor moves according to how much air deflects the air sensor plate and is also affected by control pressure. Control pressure acts on the top of the control pin, cold control pressure is low (14 psi depending on model) which lessens the resistance of the air sensor plate to rise.
How does the pressure regulator on the fuel rail work?
The pressure regulator controls the fuel pressure on the rail. Any faults thereof affect the amount of fuel injected. Difficult engine start, unstable idle RPM, and engine stalling are due to insufficient fuel pressure on the rail.
The lower connection hose is attached to the pipe that is connected to the K-Jetronic fuel distributor control input. There is also a 12V power socket on the top of the CPR. It is connected to a bimetal plate heater that is located inside and used to regulate the fuel pressure. On the photo 2 you can see the reverse side of the regulator.
How does the fuel distributor work on a WUR?
Many WURs have a vacuum diaphragm that provides enrichment during acceleration. Fuel distributor – Control center, contains a regulator to keep system pressure constant. The main moving part is a central pin which is controlled by the air sensor plate.