How can you tell if a Mercedes pressure regulator is failing?
One way to tell if it’s a fuel leak is the noticeable smell of fuel when you’re in your Mercedes with it either running or parked. Another telltale sign of fuel pressure regulator problems or damages is black smoke. If the regulator fails or is leaking then it may lead to black smoke coming from the exhaust system.
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.
Where is the pressure regulator on a sprinter?
Pull out the fuel pressure regulator from the end of the fuel rail. Keeping the device clean, remove both the green O-ring and fibre backing ring from the tip of the regulator and replace with new components. Refit the regulator assembly to the rail.
How does a Mercedes Benz Fuel pressure test work?
A fuel pressure check on your Mercedes-Benz will tell you if the fuel pressure is withing range or not. For this test, you will need a fuel pressure gauge. The Actron CP7818 fuel tester works on most Mercedes-Benz and has the required Schrader valve required for MB cars.
A fuel pressure check on your Mercedes-Benz will tell you if the fuel pressure is withing range or not. For this test, you will need a fuel pressure gauge. The Actron CP7818 fuel tester works on most Mercedes-Benz and has the required Schrader valve required for MB cars.
How to troubleshoot a Mercedes Benz fuel pump problem?
Troubleshooting a bad fuel pump problem on a Mercedes-Benz is easy. This is a job where you need to be extremely careful because you will work near fuel and there is always the risk of fire. It is recommended that you empty the tank or have the fuel tank near empty when you replace the fuel pump.
Do you need a fuel tester for a Mercedes Benz?
For this test, you will need a fuel pressure gauge. The Actron CP7818 fuel tester works on most Mercedes-Benz and has the required Schrader valve required for MB cars. This test applies to Mercedes-Benz vehicles equipped with 4-cylinder, V6, V8 and V12 gasoline engines such as M112, M113, M119, M104 M272 and M273.
One way to tell if it’s a fuel leak is the noticeable smell of fuel when you’re in your Mercedes with it either running or parked. Another telltale sign of fuel pressure regulator problems or damages is black smoke. If the regulator fails or is leaking then it may lead to black smoke coming from the exhaust system.
What happens when fuel pressure regulator goes bad?
A misfiring engine can lead to faster wear and tear on engine components and lead to expensive repairs next time you take your car in for service. A common area for the fuel pressure regulator to experience issues are in the diaphragm or in any of the seals and when this happens then a fuel leak will usually occur as well.
What should the fuel pressure be on a Mercedes Benz?
Try starting the motor and get a fuel pressure reading. As you can see from our video, the fuel pressure in our case was ranging between 54-56 PSI which is normal. At idle we were getting about 55 PSI with slight fluctuation (+/-2 PSI) when revving up the engine.