Fuel and Emission Systems Parts

When A Fuel System Fails To Deliver

Fuel delivery is vital to a vehicle's performance. A malfunctioning fuel management system can be difficult to diagnose, but the symptoms include a warning light on the dashboard, diminished fuel economy (consuming more fuel on routine drives), lack of acceleration in response to pressing the gas pedal, electrical power loss, black smoke coming from the exhaust, engine misfiring or stalling, rough idling or shaking.

A leak in the fuel tank will likely cause the smell of gas in the interior cabin and noticeable puddles of liquid underneath the vehicle after it has been parked. Fuel lines, responsible for transporting gasoline from the tank to the engine, may develop leaks due to deterioration from aging or corrosion. The same is true for the rubber seals fitted to fuel injectors, which send pressurized gasoline into the engine cylinders or intake manifold. If leaking gasoline makes contact with a hot engine component, it could start a fire-so any leaks should be immediately addressed through repairs and replacing parts of the fuel and emission system.

Whether you drive a Chevy Suburban 1500 or a Ford Fusion, NAPA AUTO PARTS carries all the best brands (NAPA Echlin, Edelbrock, Holley, MagnaFlow, Flowmaster and Bosch) of standard fuel and emission system replacement parts and high-performance components:

• Actuator
• Manifold
• Fuel damper
• Fuel control block
• Fuel filter
• Fuel vapor canister
• Air pump
• Vacuum pump
• Air by-pass valve
• Warm-up regulator
• Cold start valve
• Positive crankcase ventilation (PCV) valve
• Feedback control diaphragm
• Choke pull-off
• Throttle kicker
• Pump primer
• Solenoids
• Float bowls
• Flame traps
• Fuel flow splitter
• Banjo bolt
• Carburetor spring
• Accelerator cables and linkages
• Fuel tank straps
• Gas caps
• Idle speed stabilizer
• Speed control repair kit
• Cruise control parts
• Turbochargers
• Nitrous oxide systems

Sensors, Sensors & More Sensors

The throttle position (TPS) sensor is an essential part of a vehicle's fuel management system, tasked with ensuring that a precise air-fuel blend is routed to your engine for optimal performance. How much fuel your engine needs is linked to how much air is entering the motor via the throttle. A fuel injection system uses a sensor to tell the engine control unit (ECU) that the throttle valve is open (triggered by the gas pedal).

The manifold absolute pressure (MAP) sensor measures the amount of air pressure in the intake manifold, which helps to regulate how much power, or load, is produced in the engine. The amount of air flowing into the engine is measured by the mass air flow (MAF) sensor, which assists in keeping the motor's air density within ideal parameters. Located near the exhaust manifold, a batch of oxygen sensors screen emissions to double check the air¿fuel ratio burning in the motor.

A fuel pressure regulator helps provide constant fuel supply while driving. In fuel injection systems, it is used to build up pressure to supply the injectors with fuel. The fuel temperature sensor continually checks the temperature of the petroleum, so it is injected at the right speed. If the fuel is cold, it takes more time to burn, due to its high density. If the fuel is warm, it takes less time to burn. The engine speed sensor, connected to the crankshaft, measures how many revolutions per minute the motor is turning, so that the fuel injection and the engine timing is synced.

Check The Conditions Of Your Emissions

The full range of a vehicle's emission control parts goes further than just a car's exhaust or muffler. Due to the black clouds of soot that used to barrel out of vehicle's using diesel engines, a system was developed to inject diesel exhaust fluid (DEF) into the catalytic converter to change the emissions to cleaner gases. Depending on the type of car or truck, an exhaust area can include a diesel exhaust fluid heater, exhaust backpressure regulator, recirculation cooler or transducer.

The exhaust gas recirculation (EGR) valve, located on the intake manifold of an engine, is an emission control device that helps maintain the combustion chamber temperature. The EGR valve draws in exhaust through an intake vacuum, which dilutes the incoming air-fuel mixture, reducing the pollutants to within acceptable limits. A sticking EGR valve or blocked EGR cooler will cause rough running and trigger an engine warning light, so it is best to replace the EGR value as part of regular servicing.

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