When to replace a Mercedes Benz Fuel pressure regulator?
The system operating pressure is 35-40psi. If the operating pressure is below 35psi or fluctuates wildly, it’s probably a good bet that the regulator is bad. If you pull off the vacuum connection and there is fuel dribbling from the nipple, the diaphragm inside has failed and the regulator must be replaced (this was the case on our project car).
Can a bad fuel pressure regulator cause an engine to not start?
It would be wise to check the batteries before considering a failure in the fuel pressure regulator. It is also possible that the engine will not start because of issues in the alternator. There are other potential causes why an engine does not start. One of these is a faulty fuel pressure regulator.
What should fuel pressure be on Mercedes W210?
This will build up pressure in the fuel rail and begin to register on the gauge. The system operating pressure is 35-40psi. If the operating pressure is below 35psi or fluctuates wildly, it’s probably a good bet that the regulator is bad.
What is the function of a fuel pressure regulator?
The main function of the fuel pressure regulator is to control the pressure of fuel that gets delivered to the engine. If there is very low pressure, then fuel will move in a very sluggish manner. The cylinders will not receive the right amount fuel that gets mixed with air. You can have more air than fuel in the mixture.
What kind of fuel pump does a Mercedes 500SL use?
I have a 1992 Mercedes 500SL that takes long crank to start, and black smoke when it does fire. I have replaced the fuel pressure regulator, … read more MB 1992 300 TE wagon Fuel Pump Relay type inside the MAS relay .
The system operating pressure is 35-40psi. If the operating pressure is below 35psi or fluctuates wildly, it’s probably a good bet that the regulator is bad. If you pull off the vacuum connection and there is fuel dribbling from the nipple, the diaphragm inside has failed and the regulator must be replaced (this was the case on our project car).
Can a 1992 Mercedes Benz 500SL start without gas?
1992 Mercedes Benz 500SL. Car won’t start without putting a little gas in intake. Will keep running as long as your foot stays on the gas pedal … read more 1991 500sl, I don’t drive it much maybe at best once a week. 1991 500sl, I don’t drive it much maybe at best once a week. The last time out I notice it is running rough.
What kind of car is a 1992 Mercedes 500SL?
1992 500sl: rough running..much fuel..fuel distributor..fuel lines… 1992 Mercedes Benz 500SL. Car won’t start without putting a 1992 Mercedes Benz 500SL.
Where is the fuel regulator on a Mercedes CDI?
The Mercedes CDI series of diesel engines have an electronically controlled fuel pressure regulator mounted on the end of the fuel distribution rail. This controls, as the name suggests, the fuel rail pressure.
Why is my fuel rail regulator not working?
What happens over time is that the O-ring wears and often fails allowing pressurised fuel to bypass the valve and ebb away the required running pressure that the injectors need. Often the problem becomes more noticeable once the engine is warm and poor starting results.
This will build up pressure in the fuel rail and begin to register on the gauge. The system operating pressure is 35-40psi. If the operating pressure is below 35psi or fluctuates wildly, it’s probably a good bet that the regulator is bad.
How can I tell if my fuel regulator is bad?
The next step in determining if the regulator is bad is to check the fuel pressure on the car. There are basically two ways to do this. You can use the test port on the fuel rail itself which requires you to rig up a Schrader valve type connection to a pressure gauge, or you can rig up a pressure gauge in-line down by the fuel filter.