Knowledge is Power


Fuel Pump U is your resource for top quality information just as you’d expect from Airtex Fuel Delivery Systems whose design and manufacturing philosophy is to meet or exceed OE specifications.

Downloads & Resources

Airtex News & Events


The functions of today’s fuel injected engines rely completely on a powertrain control module (PCM) and its associated sensors, of which there are many. Fuel has the ability to adapt to altitude, temperature, humidity, and load while maintaining a constant fuel ratio of 14.7:1.

In order for the PCM to prepare fuel flow strategies, it uses sensors to determine the demand on the engine and its operating environment.


The throttle position sensor (TPS) is a potentiometer located on the throttle body and attached to the throttle plate opposite the throttle linkage. It has three wires: battery voltage, 5-volt reference, and a signal wire. Its purpose is to signal to the powertrain control module (PCM) the amount and speed of the throttle opening. This is an indication as to the demand placed on the engine at any given time.


Airtex Fuel Delivery Systems, the world’s largest manufacturer of fuel pumps, has just launched the Spanish version of it’s award winning FuelPumpU.com technical training website. This online resource, which offers real-time educational assistance, as well as current and in-depth information and fuel pump replacement support will now be available both in English and Spanish. Technicians can now visit the website for a myriad of technical resources and videos on diagnostic training and fuel delivery education in the language of their choice.


Today’s auto technicians are highly trained and skilled individuals who are proficient in vehicles’ computerized components and electrical circuitry as well as knowledgeable about all vehicle systems and subsystems.

For example, fuel pumps have become very sophisticated, as seen in computer-controlled electric fuel pump. A long list of item failures can prevent the electric fuel pump from operating, requiring a skilled technician to locate and correct such a problem.


The automotive fuel pump has a singular function — to move the fuel from the fuel tank to the engine. There are two types of fuel pumps: mechanical and electrical. The older style mechanical pump supports fuel delivery to a carburetor-operated fuel system, whereas most electric fuel pumps support fuel injection systems. Each pump’s mission is similar, but their design and method of operation differs considerably. In either case, the pump must be capable of maintaining a constant pressure and volume as required by the engine to operate efficiently.

Special Promotions