How to Diagnose a Fuel Pump Relay?

Answer The fuel pump relay is part of the fuel pump and sending unit. The relay itself is a small electrical device with four to five prongs that connects to the battery, the fuel pump and the sending uni... Read More »

Top Q&A For: How to Diagnose a Fuel Pump Relay

How to Diagnose a Bad Fuel Pump on an EFI Pickup?

The introduction of EFI (electonic fuel injection) on light duty pick-up trucks has taken a mechanical device and placed it squarely into the realm of electronics. The fuel pump is now located in t... Read More »

How to Diagnose a Weak Fuel Pump?

A weak fuel pump in your vehicle can prevent you from driving it. The fuel pump is responsible for providing enough fuel to the engine. If the fuel pump is not providing enough pressure to the engi... Read More »

What is Fuel Pump Relay?

A fuel pump relay is a switch to activate the fuel pump when a car engine is first turned on. Problems with a fuel pump relay can make it difficult or impossible to start the car.References:AA1Car:... Read More »

How to Determine If a Fuel Pump Relay Is Bad?

A car's fuel pump relay turns on the fuel pump when the motor runs. When a relay is defective, it is usually because of a bad coil or bad connection. To check both operations, remove the relay by p... Read More »