68211269AA | Genuine Mopar® Fuel Injection Pump 2014-2023

1. Pressurizes the fuel
   It raises fuel to extremely high pressure so it can be atomized properly when injected into the combustion chamber.

2. Controls the timing of fuel delivery
   It ensures fuel is injected at the exact moment needed for efficient combustion.

3. Meters the correct amount of fuel
   It adjusts how much fuel is sent into the cylinder depending on engine load, speed, and throttle position.

4. Distributes fuel to each cylinder
   In multi-cylinder engines, the pump sends the right amount of fuel to each injector in sequence.

Why it’s important

• Improves fuel efficiency

• Reduces emissions

• Ensures smooth engine operation

• Provides power and maintains performance

• Prevents engine knocking and starting issues

1. Hard Starting or No Start

If the pump can’t generate enough pressure, the engine may crank for a long time or fail to start entirely.

2. Rough Idle or Misfiring

Irregular fuel delivery causes unstable engine running, especially at idle.

3. Loss of Power / Poor Acceleration

A weak pump can't supply enough fuel under load, making the engine feel sluggish.

4. Engine Stalling

The engine may shut off randomly, especially when idling or slowing down.

5. Excessive Smoke from Exhaust

• Black smoke: Too much fuel (overfueling).

• White smoke: Poor combustion due to low pressure.

• Blue smoke: Fuel mixed with engine oil.

6. Poor Fuel Efficiency

Incorrect fuel metering leads to increased fuel consumption.

7. Overheating Engine

A failing pump can cause improper combustion, which increases engine temperature.

8. Fuel Leaks

Diesel around the pump or injector lines is a clear warning sign.

9. Unusual Noises

Whining, ticking, or grinding noises from the pump indicate internal wear.

10. Check Engine Light (for modern engines)

ECU may detect incorrect fuel rail pressure or timing.