The symptoms of fuel pump relay problems are usually the engine not starting, or stalling without warning. A key element in the electrical system, the relay controls power to the fuel pump. The fuel pump will not be able to get the required power if this relay fails and cause engine perform inexpert as a consequence or makes it impossible to start. Commonly in Relay — The relay of the fuel pump is approximately 12 volts in most modern cars, which means that your electric power pump will be receiving good supply for proper functioning.
Not hearing the fuel pump prime when turning turn key in ignition is a common symptom of this issue. Usually, you will hear the pump charge up a bit just by quickly turning on ignition. If this sound is not present, the relay may be bad. Relay failures (as reported by auto repair services) are the cause of almost 30% or no-start condition and is a common problem in cars that are over ten years old.
Checking the voltage of a fuel pump is another method you can use to identify whether or not there really exists an relay issue. One way mechanics can test voltage at the fuel pump connector is by using a multimeter. It should be in the 12–14 range—whatever that number may vary from manufacturer to manufacturer. Anything lower indicates that the fuel pump is not getting enough power to deliver all the gas required by your engine.
Intermittent FailureRA low-bat message can also be an indication of a relay problem. In some instances, a car will drive and be in good condition one moment but may not want to start the next. The relay may work intermittently and cause the fuel pump to stop. Cases like this have been recorded in a number of automotive forums, simply drivers testifying to their vehicles cutting off and it seems alot more likely that heat is causing the relay to fail as so many drivers reported it happening sometimes during long trips.
When the relay itself is suspected, swapping it with another like-minded relay from the fuse box can point to what went wrong. Relays are pretty stand configuration, and swapping with another like the headlight or air conditioning relay you can quickly be shown if the fuel pump is your problem The following simple test has been suggested by numerous automotive repair experts, and will usually diagnose a bad relay in minutes.
Related Articles How to Determine If Fuel Pump Relay Is Bad? Hope you got sense of Fuel pump priming Check for voltage Fault finding with Relay swaps Knowing these methods can keep time and also who work repairing. You can visit Fuel Pump is you want to know more about the fuel pump and other components.