Diesel Engine Common Rail Injector and Unit Pump - A Closer Look

Do you want a closer look at the parts you order for your diesel engine? Today, we're going to be talking about a remanufactured Bosch Unit Fuel Pump System for your Mack E7 and a remanufactured Bosch Common Rail Fuel Injector for the Cummins ISB/ISL. 

Here at Highway & Heavy Parts, we're proud to offer Genuine Bosch products so we know we're supplying our customers with high quality, trustworthy parts directly from Bosch.


We have the best parts for your diesel engine! Let our ASE Certified Technicians help you find the parts you need.

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About the Bosch Unit Fuel Pump System


Bosch Unit Pump Mack | Highway & Heavy Parts


This pump is built to meet or exceed OE performance and durability. It is produced and tested using the latest Bosch technology. 

Are you looking for lower fuel consumption and fewer emissions? This  high-performance engine pump helps provide that, along with quiet running.

This pump system is specifically designed for heavy-duty commercial diesel vehicles with up to eight cylinders. It fits the years 2001 and 2002 E7 series and comes with a 1-year, unlimited mileage warranty. 

Irregular, inconsistent maintenance of your engine can lead to unit pump issues, and so can installing low quality parts. Help avoid this by installing genuine Bosch components.

When you're going through your E7, trying to diagnose the unit pump, keep in mind that you can swap these from hole to hole to see if the problem follows you.

Also, you're going to want to make sure you don't have a camshaft issue. A camshaft problem can create very similar symptoms to a failed unit pump.

Want more info? Check out our post on Mack fuel system components


About the Bosch Common Rail Fuel Injector


Bosch Common Rail Fuel Injector ISL | Highway & Heavy Parts


Like the pump system we discussed above, this injector is built to meet or exceed OE standards. All wearable components are replaced with new OE parts. 

If you're like us, you want your parts to have the latest and greatest technology. This injector has been remanufactured with upgrades to components and specs. It is produced and tested using the latest Bosch technology. 

This component fits the 2003-13, 8.3L Pegasus (ISL) engine and comes with a 1-year, unlimited mileage warranty.

If you notice a loss of power and RPM, excessive exhaust smoke, or corroded fuel injectors, you probably need an injector replacement. 

When you're replacing the common rail injectors, make sure everything is clean. You're going to want to make sure you've got clean fuel in it,  new filters, and all clean fittings and components. These are very high tolerance injectors, and any amount of dirt getting inside them can be detrimental to their lifespan.

Do you know the difference between injector types? Read our blog on the differences between common rail and unit injectors to find out more.


If you want the best quality fuel system parts for your diesel engine, give us a call here at Highway & Heavy Parts. We offer genuine Bosch components to help keep your engine running at its best. 


Are you looking for quality fuel system components?  Call our ASE Certified Techs at 844-304-7688. Or, you can request a quote online.