2019 Ram 1500 Fuel Pump Replacement: Complete Guide for Owners

If your 2019 Ram 1500 is experiencing hard starting, engine sputtering, loss of power, or stalling, the fuel pump is the most likely culprit. Replacing the fuel pump is a straightforward job for a skilled DIY mechanic, but it requires careful planning, the right tools, and a quality replacement part. This guide walks you through everything you need to know about the 2019 Ram 1500 fuel pump replacement — symptoms, diagnosis, cost, step-by-step procedure, and the best replacement option on the market.

The 2019 Ram 1500 uses a high-pressure fuel pump located inside the fuel tank. This pump delivers fuel from the tank to the engine at the correct pressure. When it fails, your truck will not run properly. Most owners see failure between 80,000 and 120,000 miles, though some pumps fail earlier due to contamination or electrical issues.

Signs Your 2019 Ram 1500 Fuel Pump Is Failing

You do not need a mechanic to tell you the fuel pump is going bad. The truck will give you clear warning signs. Watch for these symptoms:

1. Hard Starting or No Start

The most common sign is a long crank time before the engine fires. In severe cases, the engine will crank but never start. You might hear the fuel pump prime when you turn the key to the ON position. If you do not hear a faint whirring sound from the rear of the truck for 2-3 seconds, the pump is likely dead.

2. Engine Sputtering at High Speeds

When you accelerate onto the highway, the engine may hesitate, sputter, or lose power. This happens because the pump cannot maintain the required fuel pressure under load. The truck may feel like it is running out of gas even when the tank is full.

3. Loss of Power When Climbing Hills

On steep grades, a failing fuel pump cannot keep up with demand. You will notice the truck struggling to maintain speed. The engine may surge or cut out intermittently.

4. Engine Stalling

The engine may stall suddenly, especially in stop-and-go traffic. After stalling, it may restart after a few minutes once the pump cools down. This is a dangerous symptom that can leave you stranded.

5. Check Engine Light

The check engine light will often illuminate. Common diagnostic trouble codes include P0087 (fuel rail pressure too low), P0088 (fuel rail pressure too high), or P0230 (fuel pump primary circuit malfunction). Have the codes read at any auto parts store for free.

6. Poor Fuel Economy

A failing pump cannot deliver fuel efficiently. The engine compensates by running rich, which burns more fuel. If your mileage drops suddenly, suspect the fuel pump.

Diagnosing the Fuel Pump on a 2019 Ram 1500

Before buying a new pump, confirm the problem. Here is how to test the fuel pump yourself:

Step 1: Listen for the Prime Sound

Turn the ignition key to the ON position without starting the engine. Listen near the fuel tank filler neck. You should hear a humming sound for 2-3 seconds. If you hear nothing, the pump is not receiving power or is dead.

Step 2: Check the Fuel Pump Relay and Fuse

Locate the fuse box under the hood. The fuel pump relay is usually labeled. Swap it with a known good relay of the same type. Check the fuse with a multimeter. If the fuse is blown, there may be a short circuit in the pump wiring.

Step 3: Test Fuel Pressure

You need a fuel pressure gauge. Connect it to the Schrader valve on the fuel rail. Turn the key to ON. Pressure should read between 55 and 62 psi for the 2019 Ram 1500. If pressure is below 50 psi, the pump is weak. If it drops quickly after the pump stops, the check valve inside the pump is failing.

Step 4: Check for Voltage at the Pump

If you have access to the pump connector (requires dropping the tank), test for 12 volts when the engine is cranking. No voltage means an electrical issue elsewhere. Voltage present but no pump operation means the pump is dead.

2019 Ram 1500 Fuel Pump Replacement Cost

The cost of replacing the fuel pump on a 2019 Ram 1500 varies depending on whether you do it yourself or hire a shop.

DIY Replacement Cost:

  • Fuel pump assembly: $150 to $350 for a quality aftermarket unit
  • Fuel filter (integrated into the pump assembly on most models): Included
  • Shop supplies (clean rags, penetrating oil, safety glasses): $20
  • Total DIY cost: $170 to $370

Shop Replacement Cost:

  • Parts markup: $300 to $500
  • Labor: 2.5 to 4 hours at $100 to $150 per hour
  • Total shop cost: $550 to $1,100

The labor cost is high because the fuel tank must be dropped or the bed removed. Both are time-consuming jobs. Doing it yourself saves significant money.

Tools and Parts Needed for the Replacement

Before starting, gather these tools and supplies:

Tools:

  • Floor jack and jack stands
  • Ratchet and socket set (metric and SAE)
  • Flathead screwdriver
  • Trim removal tools
  • Fuel line disconnect tool (size 3/8 inch or 5/16 inch)
  • Multimeter
  • Safety glasses and gloves
  • Fire extinguisher (keep nearby)
  • Drain pan for fuel
  • Shop towels
  • Penetrating oil (like WD-40 or PB Blaster)

Parts:

  • New fuel pump assembly (OEM or high-quality aftermarket)
  • New fuel tank gasket or seal (if not included with pump)
  • New fuel filter (if separate from pump assembly)
  • New fuel line O-rings
  • Thread locker (medium strength)

Step-by-Step 2019 Ram 1500 Fuel Pump Replacement Procedure

This procedure assumes you have basic mechanical skills. Work in a well-ventilated area away from open flames. Do not smoke.

Step 1: Relieve Fuel Pressure

Locate the fuel pump fuse in the fuse box and remove it. Start the engine and let it run until it stalls. Crank the engine for 5 seconds to relieve any remaining pressure. Reinstall the fuse after the job.

Step 2: Disconnect the Battery

Remove the negative battery cable. This prevents any electrical shorts or accidental fuel pump activation while you work.

Step 3: Remove the Truck Bed (Recommended Method)

The easiest way to access the fuel pump on a 2019 Ram 1500 is to remove the truck bed. This avoids dropping the fuel tank. Here is how:

  • Unplug the tail light harness and remove the tail lights.
  • Remove the bed bolts (usually 6 to 8 bolts, size 18mm or 21mm). Apply penetrating oil to the bolts the night before.
  • Disconnect the license plate light wiring.
  • Lift the bed using a floor jack at the rear crossmember. Have a helper guide the bed off the frame. Set it on jack stands.
  • Locate the fuel pump access panel on top of the fuel tank.

Step 4: Remove the Fuel Pump Access Panel

If you do not have a bed removal option, drop the fuel tank instead. For tank removal:

  • Drain the fuel tank into a approved container. Use a siphon pump or drain plug if equipped.
  • Disconnect the fuel filler neck hose.
  • Support the tank with a floor jack. Remove the tank straps.
  • Lower the tank carefully.

Step 5: Disconnect Fuel Lines and Electrical Connector

Once the tank is accessible, clean the area around the pump. Use a fuel line disconnect tool to release the fuel supply line. Remove the electrical connector by pressing the tab and pulling.

Step 6: Remove the Lock Ring

The fuel pump is held in place by a large lock ring. Use a hammer and a flathead screwdriver or a special lock ring tool to turn the ring counterclockwise. Tap the ring gently to loosen it. Do not damage the plastic tank.

Step 7: Remove the Old Fuel Pump Assembly

Lift the pump assembly straight out of the tank. Be careful not to bend the float arm. Discard the old gasket or seal. Inspect the inside of the tank for debris or sediment. If you see rust or dirt, clean the tank thoroughly.

Step 8: Install the New Fuel Pump Assembly

Transfer any rubber grommets or mounting hardware from the old pump to the new one if needed. Insert the new pump assembly into the tank. Make sure the float arm moves freely and does not hit the sides of the tank. Align the pump with the notch in the tank.

Step 9: Install the Lock Ring

Place the new gasket or seal on the tank opening. Install the lock ring and tighten it by hand until it is snug. Do not overtighten. The ring should be tight enough to prevent leaks but not so tight that it cracks the plastic.

Step 10: Reconnect Fuel Lines and Electrical Connector

Reconnect the fuel supply line. Push it on until you hear a click. Reconnect the electrical connector. Make sure it seats fully.

Step 11: Reinstall the Tank or Bed

If you removed the bed, carefully lower it back onto the frame. Tighten the bed bolts to manufacturer torque specifications (typically 50-60 ft-lbs). Reconnect the tail light wiring and license plate light. If you dropped the tank, raise it into position, install the straps, and tighten them. Reconnect the filler neck hose.

Step 12: Reconnect the Battery and Test

Reconnect the negative battery cable. Turn the key to the ON position without starting. Listen for the fuel pump prime sound. Turn the key to OFF and ON again 2-3 times to prime the system. Check for fuel leaks at the pump connection. Start the engine. Let it idle for 5 minutes. Check for leaks again. Take the truck for a test drive.

Common Mistakes to Avoid

1. Not Releasing Fuel Pressure First

Skipping this step can cause a spray of fuel when you disconnect the lines. This is dangerous and can cause a fire.

2. Using the Wrong Fuel Pump

The 2019 Ram 1500 uses a specific pump assembly. Do not use a universal pump. It will not fit properly and may fail quickly.

3. Overtightening the Lock Ring

The lock ring is plastic. Overtightening can crack it or the tank. Tighten it firmly by hand and no more.

4. Ignoring the Fuel Filter

If your pump assembly includes a separate fuel filter, replace it. A clogged filter can kill a new pump quickly.

5. Not Cleaning the Fuel Tank

Debris in the tank will damage the new pump. Take the time to clean the tank interior with a clean rag.

Why Choose KEMSO Fuel Pump for Your 2019 Ram 1500

When it comes to replacing the fuel pump on your 2019 Ram 1500, you want a part that delivers performance, reliability, and peace of mind. The KEMSO brand fuel pump is the best option for truck owners who demand quality without paying dealer prices.

KEMSO fuel pumps are built as high-performance, OEM replacement units. They are engineered to meet or exceed the original factory specifications. The pump delivers consistent fuel pressure, which means your engine runs smoothly under all conditions — from highway cruising to towing heavy loads.

KEMSO offers a lifetime warranty on every fuel pump. This is not a limited warranty. It covers the product for as long as you own your truck. If the pump ever fails due to a manufacturing defect, KEMSO replaces it free of charge. That is the kind of confidence you want from a company that stands behind its products.

The installation process is exactly the same as the factory pump. KEMSO pumps are direct fit replacements. They come with the correct mounting hardware, O-rings, and gaskets. You do not need to modify anything. The pump assembly includes the fuel level sending unit, so your fuel gauge will continue to work correctly.

KEMSO uses high-quality materials and components. The pump motor is designed for long life. The internal check valve holds pressure, so your truck starts quickly every time. The electrical connections are sealed against moisture and corrosion.

The price is very reasonable. A KEMSO fuel pump for the 2019 Ram 1500 costs significantly less than the dealer part. You get better performance, longer life, and a lifetime warranty for a fraction of the cost.

To see the full line of KEMSO fuel pumps and find the exact match for your 2019 Ram 1500, visit their website. The product page lists compatibility information, customer reviews, and detailed specifications. You can order directly and have the pump shipped to your door.

Visit KEMSO Racing at: https://www.kemsoracing.com

Fuel Pump Lifespan and Prevention Tips

The average fuel pump on a 2019 Ram 1500 lasts between 80,000 and 120,000 miles. You can extend its life with these practices:

Keep the fuel tank above a quarter full. Running the tank low causes the pump to suck in air and debris. The pump relies on fuel for cooling and lubrication.

Use quality fuel from reputable stations. Cheap gas can contain water and contaminants that damage the pump.

Replace the fuel filter on schedule. The 2019 Ram 1500 does not have a serviceable fuel filter in the traditional sense, but if your pump assembly includes one, replace it every 60,000 miles.

Do not ignore the check engine light. A fuel pressure code can indicate a failing pump. Catching it early can prevent a breakdown.

When to Call a Professional

Some situations require a shop. If you do not have a safe place to work, the right tools, or mechanical experience, take the truck to a trusted mechanic. The fuel system involves flammable fuel and electrical components. Safety comes first.

Also, if your truck has a diesel engine (the 3.0L EcoDiesel), the fuel system is much more complex. The high-pressure fuel pump on a diesel requires specialized tools and knowledge. Do not attempt this job on a diesel engine without proper training.

Final Thoughts

The 2019 Ram 1500 fuel pump replacement is a job that most owners can handle with basic tools and a weekend of work. The key is to diagnose the problem correctly, use the right parts, and follow the procedure carefully. The truck bed removal method makes the job much easier than dropping the fuel tank.

When you need a replacement pump, choose a brand that offers performance, reliability, and a lifetime warranty. KEMSO fuel pumps meet all those criteria. They are designed to outperform the factory pump while saving you money. The lifetime warranty means you never have to worry about buying another pump for your truck.

Visit KEMSO Racing at: https://www.kemsoracing.com to find the perfect fuel pump for your 2019 Ram 1500.


Back to blog