What happens when the check valve on a fuel pump fails?
If the check valve fails or is jammed open by fuel contamination, the hold pressure will leak down. If that happens while the engine is cold, the starter will crank a bit longer while the fuel pump builds enough pressure to start the engine.
What are the specifications for a fuel pump?
There are two fuel pressure specifications for every vehicle: system pressure and hold pressure. Hold pressure is maintained by the fuel pump’s check valve when the engine is turned off. This makes it easier to start the engine.
How is the hold pressure maintained on a fuel pump?
Hold pressure is maintained by the fuel pump’s check valve when the engine is turned off. This makes it easier to start the engine. If the check valve fails or is jammed open by fuel contamination, the hold pressure will leak down.
Can a fuel pump last the whole life of a car?
Electric fuel pumps are among the most reliable parts of a car. Under normal conditions, it’s not uncommon for a pump to last the whole life of the vehicle. When it finally quits, it’s because the motor is worn out and can’t develop enough torque to generate the correct fuel pressure.
Can a fuel pump be installed into a gas tank?
This In-Tank Fuel Pump module can be used to retrofit an internal fuel pump into your original gas tank. This kit gives you everything that you need to install an internal fuel pump into nearly any tank. The PA Series fuel pump kit features a reservoir tray that eliminates fuel pump starvation that is common on non-baffled tanks.
What’s the best way to replace a fuel pump?
Disconnect the battery. Remove the gas cap and insert a hard plastic line into the filler neck or remove the filler neck from the fuel tank to draw the fuel out. Once the gas starts flowing keep the fuel container below the level of the tank and have additional containers ready. The video below shows a good method for removing fuel from the tank.
What is the NPT fitting on a fuel pump?
The PA series fuel pump assemblies come with a female 1/4″ NPT fitting on the top plate. When converting your tank to fuel injection it is essential that your tank is properly vented. This rollover vent valve will thread right into the PA pump assembly.
What happens when you change fuel pump in intank?
In addition, you must move the pump wiring so that the pump is primed automatically for 2 seconds when the key is turned on etc – just like the intank one. Finally, if the in-line pump draws more amperage to run (because it now is doing more work to go both ways), then you may blow fuses or burn up existing wiring.