Can a Fuel Pump Relay Cause the Engine to Stall?

Is a Stalling Engine Due to a Faulty Fuel Pump Relay A bad fuel pump relay can definitely stop the engine. The fuel pump relay is an electrical switch that signals the fuel pump to perform, so it delivers the right quantity of gas to support engine requirements Without that continual infusion of fuel, the engine cannot sustain fire. According to studies, fuel systems accounting for over 40% of instances where an engine dies on the road and a bad fuel pump relay is one of this components most guilty.

When diagnosing stalling issues, automotive technicians often say "relay failure". Relay – Over time the relay responsible for controlling the flow of electrical current to your fuel pump can fail. The average lifespan of a relay is 50,000 to 100,000 miles or it can be shortened depending on vehicle usage and electrical load. One case resulted in a report of stalling after 60,000 miles on the road, and the NHTSA found that relay degradation was occurring as a result of excessive heat and electrical surges.

If the fuel pump relay fails, then the circuit opening relay does not give the power to the fuel pump. This voltage typically falls within 12 to 14 volts in most vehicles. This voltage can be interrupted by a relay failure and the result is shut off of the fuel pump, which causes engine to die. Some studies have found that a 10% reduction in required voltage can reduce the efficiency of the pump by 30%, which means not enough fuel pressure. This can cause stalling under heavy load or acceleration.

It is accompanied by reports of relay failures down the component line, many a time linked to heat generation as being the root cause. High temperature of the engine compartment can reduce the durability of fuel pump relays Also on the list is an incident well-reported on by Motor Trend, in which (brand redacted) issued a manufacturer recall for over 150,000 vehicles when heat-related relay failure led to widespread stalling.

As Thomas Edison put it "The three great essentials to achieve anything worth while are first, hard work; second, stick-to-itiveness; third common sense." This could definitely apply to car repairs. A car that stalls because of a faulty fuel pump relay will usually have to be slugged due to the quick identification of the problem, and common sense in replacing the defective part before more damage can be done.

In terms of cost, this is a relatively inexpensive repair with most repairs costing between $50 and 150.00 total including labor. That said, putting off the issue could prompt much more costly repairs later on. A faulty intermittent relay that causes the car to stall over and over can break a fuel pump, which usually runs $500-$1,000 to repair.

Often, owners describe their vehicles stalling as they drive, sometimes only after having been on the road for a long time Using the electrical stress on the relay over time falls in line with this pattern. While not imminent, relays should be replaced every five or six years (motors age quickly) to prevent sudden stalling.

Summary Overall,for as little as they are,the fuel pump relays relays play a BIG part in the running of your engine. This leads to the fuel pump not being able to operate, meaning also engine stalls. One must always inspect and replace relays on a regular basis to prevent these problems. For more information about fuel pump systems and parts go to Fuel Pump.