A fuel pump check valve is part of a mechanical fuel pump found in many vehicles ahead of electronic injection. The check valve is intended to ensure that the fuel in the vehicle only flows in the correct direction from the fuel pump and that the pressure is maintained.
Symptoms of a broken check valve For example, broken check valves vibrate and even leak some internal parts when problems occur. Other symptoms of check valve failure include backflow, excessive wear, and component damage. Check valves also rattle when they start to collapse.
- Open the trunk and remove the blanket.
- Remove the fuel pump access cover.
- Cut the fuel line from the fuel pump to the hard sedan.
- Slide two fuel system hose clamps onto the fuel line, one on each side of the cut.
- Insert the check valve into the two halves of the fuel line.
IN LINE FILTER WITH CONTROL VALVE. FUELAB® Series 848 Inline Fuel Filters with Integrated Check Valve ensure that the fuel system maintains fuel pressure after the engine and pump have been shut off. Our check valves are methanol, ethanol, gasoline and diesel.
Check valves work on RETURN type fuel systems. These systems can be recognized by the fact that they have a pressure line to the fuel distributor and a return line after the fuel pressure regulator. Check valves should not be installed in fuel return systems. Reconnect the fuel pump fuse and start the engine.
A bad or faulty fuel gauge usually provides symptoms that can alert the driver of a possible problem. The fuel gauge behaves erratically. One of the first symptoms of a problem with the fuel gauge is that the fuel gauge becomes erratic. The fuel gauge sticks to the floor. The fuel gauge is blocked.
A weak pump that does not provide enough pressure can cause engine malfunction, misfire and hesitation to accelerate. The pump may be worn, a clogged fuel filter may restrict fuel flow to the engine, or the pump may not have enough voltage on the circuit to run at normal speed.
It is important to familiarize yourself with the warning signs of a fuel pump failure - this will help you troubleshoot before it’s too late. The engine sprays at high speed. Rising temperature. Fuel pressure gauge. Loss of power when the car is running. The surgeon. Less kilometers. The engine will not start.
To bleed air from the low pressure side of the fuel system, open the fuel ■■■■■■■■ and drain holes behind the pump one at a time, starting with those closest to the pump and continuing to pump until fuel comes out and not air.
Try every 12 months. Repair every three to five years.
A component failure can impair valve operation, which is intended to prevent reversal in the case of a non-return valve. In extreme cases, failures can cause loss of line components and other faulty or failing valves or line devices.
Place a hand on the valve and move your ear to the valve if the liquid temperature permits. Any sound of flowing liquid indicates a leak. A properly functioning valve will only produce a small click, indicating that the check valve is closing and blocking backflow.
The check valve can be installed in horizontal or vertical piping with upward flow. Mounting for vertical installations is essential.