Do fuel pumps need a tune?
It depends on just HOW much larger the new fuel pump is. If the fuel pump is slightly larger the base tune will work. However if the FP is MUCH larger, then the PCM will call for a certain FP duty cycle.
What to do if your car wont start after replacing the fuel pump?
Car won’t start even after I replaced the fuel pump. Car won’t start and turned off while driving. Replaced the fuel pump and I can hear it working. The car still won’t start.
Where is the fuel pump in a car?
To resolve this issue, the fuel tank must be accessed and repaired or removed. The location of the fuel tank depends on the construction of the vehicle. In a vehicle equipped with a carburetor, the fuel pump is often located outside of the fuel tank. With a vehicle that has a fuel injector, the fuel pump is located inside of the tank.
What causes a fuel pump to whine when you start the car?
A low fuel level can cause the engine to work much harder to build the necessary pressure to pump the fuel. To analyze the problem, start the car when the fuel is low (below one-fourth tank) and listen for the sound. If the whine is audible, fill the tank immediately. When you start the vehicle again, the whine should be reduced or absent.
What do I need to check fuel pressure in a Mercedes Benz?
Checking the fuel pressure is very simple. For this test, you will need a fuel pressure gauge. What you need is a fuel pressure gauge with Schrader valve adapter. A great and affordable gauge that we have used in the past is this Actron Fuel Pressure Gauge which works on Mercedes-Benz cars.
Car won’t start even after I replaced the fuel pump. Car won’t start and turned off while driving. Replaced the fuel pump and I can hear it working. The car still won’t start.
Checking the fuel pressure is very simple. For this test, you will need a fuel pressure gauge. What you need is a fuel pressure gauge with Schrader valve adapter. A great and affordable gauge that we have used in the past is this Actron Fuel Pressure Gauge which works on Mercedes-Benz cars.
What should I do if my Mercedes Benz won’t start?
Start the car and you should be able to get around 60 psi. When the engine is running and when you turn off the engine the pressure should stay steady. Always perform this test on a cold engine. Next, make sure that the fuel injector connections are secure and not loose. Check the fuel pump and the fuel pump relay.
What causes a fuel pump to die before filling up?
If you make a habit of running your tank all the way to empty before filling up; your fuel pump will most likely die before its designed lifespan. This is due to the fact that when you shut off the engine with a low fuel level; the fuel can drain from the priming chamber designed into the fuel delivery system.