Why Do 2003-2007 Dodge 5.9L Cummins Fail?

2007 Dodge 5.9L

Dodge Cummins trucks are workhorses so why do some 2003-2007 Dodge 5.9L Cummins fail? Experiencing poor power, problems cranking, or total failure to crank are all signs of a fuel pump failure. Reasons for Cummins fuel pump failure:

  • Bad Diesel
  • Failling MRomp
  • Freeze plugs blown out

To determine the exact reason your 5.9L Cummins failed NW Fuel provides injector testing services.

What are the symptoms of a bad injector pump?

Symptoms of a bad injector pump on a Dodge Cummins 5.9L engine include a hard start, no start, or low power.

Can a bad injector cause a knock?

A bad injector on a Dodge Cummins 5.9L engine can cause a knock.

What happens if you drive with a bad fuel injector?

Driving a Dodge Cummins 5.9L with a bad injector can cause serious engine damage, and should be avoided where possible.

How do Cummins injectors work?

Cummins injectors used in the Dodge Cummins 5.9L are high-pressure common rail injectors built by Bosch.  They use a computer to trigger a solenoid and can inject multiple bursts of fuel into the cylinder all on a single stroke.

How long do fuel injectors last?

Fuel injectors for the Dodge Cummins 5.9L should last between 200,000 and 300,000 kms when properly treated.  This means running good quality clean diesel fuel.

Is fuel injector cleaning worth it?

Fuel injector cleaning on a Dodge Cummins 5.9L injector is generally not recommended.  When these injectors fail, it’s due to mechanical wear, not dirt.

How much does it cost to replace a fuel injector?

Replacing fuel injectors in your Dodge Cummins 5.9L can range from $2600-$3200 CAD, depending on what other work is done at the same time.

How do you maintain a diesel engine?

Diesel engines such as the Dodge Cummins 5.9L will provide a very long, trouble-free life when maintained according to the manufacturer’s recommendations.  This means changing the oil, coolant, and filters regularly, and using high-quality engine oil and diesel fuel.

Is it better to leave a diesel engine running?

It is no longer recommended to leave diesel Dodge Cummins 5.9L engines running for any significant lengths of time.  This is generally a throwback to the 60’s and 70’s.

How does a Cummins diesel engine work?

The Dodge Cummins 5.9L works on the same principals as most 4 stroke diesel engines or compression ignition engines.  It is an inline 6 cylinder engine.

What trucks have Cummins engines?

Dodge trucks from the late 80’s until today have the Cummins diesel engine in them.  The Dodge Cummins 5.9L was used from 1988 to 2007 in Dodge vehicles, before moving to the similar Dodge Cummins 6.7L.  Cummins engines are also found in many medium and heavy-duty trucks, boats, machinery, generators, and a wide variety of other applications.

Bosch Part Number 0 986 435 503

Bosch remanufactured diesel fuel injector to restore performance for your 2003-2004 Dodge 5.9l Cummins. Part number Bosch 0 986 435 503.


Bosch remanufactured diesel fuel injector to restore performance for your 2003-2004 Dodge 5.9l Cummins.

Bosch Part number 0 986 435 505

bosch injector-515


Reman diesel injector by Bosh restores performance to your 2004.5 – 2007 Dodge 5.9l Cummins.