What should I do if my Renault fuel pump is not working?
The first thing to do is to turn on the ignition and listen for the sound of the Renault fuel pump. It should make an audible running sound for a few seconds after the ignition is turned on. If there is no sound, check for loose, broken or corroded connections. Next, check that the relay switches in and out and the contacts are bright and clean.
Why is my fuel pump not working on my Trafic?
If the test shows no problem, then what remains is a possible fault with the fuel pump. This will have to be checked and fixed if need be. A 2008 Renault Trafic with a 2.0 DCI M9R engine will start and run only if fuel is pumped manually. The diagnostic test showed fault DF895 – Low Pressure On Rail.
How to test the performance of a fuel pump?
Now start the engine so we can test the performance of the pump. While the engine is running, the fuel pressure should drop about 5 psi, from the static prime pressure (DPI) then snap the throttle, the fuel system pressure should jump up about 5 psi. this means the fuel pump and pressure regulator is working correctly.
What should I do if my fuel pump is low?
The pressure should hold continuously throughout the test. If the fuel pressure is low under load or while idling the fuel filter (if equipped) could be clogged, or the fuel pump has failed and needs replacement. Remove the fuel pressure gauge and reinstall the dust cap or remove the fuel line adaptor clean up any excess fuel. Watch the video!
What to do if your fuel pump is not working?
If nothing after that, then the fuel pressure regulator is not working and needs replacing. If you get pressure to the rail, then there could be a problem with the injectors; they may be either dirty or plugged up. Take the injectors off the engine and clean them with CLR.
Where is the weep hole on a mechanical fuel pump?
Most mechanical fuel pumps have a weep hole on the bottom side of the unit. When the internal diaphragm leaks, fuel escapes through the weep hole to notify the vehicle owner of a malfunction. This is one of the more common fuel pump problems. Usually found on classic cars between 30 and 60 years old.
When does a fuel pump leak in a classic car?
When the internal diaphragm leaks, fuel escapes through the weep hole to notify the vehicle owner of a malfunction. This is one of the more common fuel pump problems found in classic cars that are between 30 and 60 years old.
When do you replace a mechanical fuel pump?
If there is no pressure, or if pressure is less than specifications, replace the pump. Most mechanical fuel pumps have a weep hole on the bottom side of the unit. When the internal diaphragm leaks, fuel escapes through the weep hole to notify the vehicle owner of a malfunction.