Fortunately, there is a method to perform that process in the safest way while also ensuring the tools are used as intended. Since fuel pumps are usually located inside a fuel tank, this means that to replace one, mechanics will often need to remove the tank. The most important part is that for avoiding a fire hazards the very first step is to disconnect the vehicle battery to prevent from live sparks during cleaning. Fuel systems run under pressure–typically 40-70 PSI–so before starting you should relieve any system pressure. Fuel pressure for servicing is relieved by removing the fuel pump fuse and running the engine until it stalls, since this tells you that the pressure has been completely relieved – which is typical for most mechanics out there.
Now that the pressure is released, lift the car and set it on jack stands. Most of the time, removing the fuel tank is needed because it provides clear access to the pump assembly. Chances are a full fuel tank could weigh more than 100 pounds, so draining it beforehand lightens the vessel and makes handling safer. Once you have the tank free, unplug fuel lines and wire harnesses The new pump is wired into the existing harness, so labeling the connectors is beneficial in order to reconnect them, as a failure to do so may cause the new pump to run incorrectly or the relay to get damaged.
While replacing an old pump is a good time to check the condition of the fuel filter and replace it if not done lately. When the pump has to work harder to maintain flow due to a clogged filter, we can reduce the lifespan of the pump by as much as 30%. The pump’s performance would be optimized when having an old filter replaced with a new one. In addition, only avoiding further wear is possible with the new filter.
Mounting the new pump in a secure manner, and reconnecting all lines and wiring, ensuring that all fittings are tight and not leaking. Others need to be calibrated to meet the specs for the vehicle’s fuel pressure. Reattach the battery after installation then turn the ignition to the “on” position (no need to start the vehicle) to get any air out of the pump. Check for leaks once primed, then drop the vehicle down.
As automotive expert Ed China warned, “Fuel systems require precision.” Installation done right saves from trouble down the line, helps the pump deliver the fuel where it needs to go.
If you need a replacement Fuel Pump an inexpensive quality model will provide the longest life and best performance yet may make replacing it a real drag but replacing it you most certainly should to prevent the risk of not running smooth.