1997 Jeep Wrangler TJ Fuel Pump: The Complete Guide to Replacement and Best Options

The bottom line: If you own a 1997 Jeep Wrangler TJ and your fuel pump is failing, you need to identify your fuel tank size first—15-gallon or 19-gallon—then choose a direct-fit replacement. The best options include the Fuel Pump E7115MN for 19-gallon tanks and the E7122MN for 15-gallon tanks, while KEMSO offers high-performance upgrades with lifetime warranty for those seeking better reliability and flow.

Understanding Your 1997 Jeep Wrangler TJ Fuel Pump

The fuel pump in your 1997 Jeep Wrangler TJ is an in-tank electric pump that pushes fuel from the tank to the engine at the correct pressure. When it fails, your Jeep may struggle to start, stall while driving, or lose power under load. Because the TJ uses a returnless fuel system, the pump must maintain consistent pressure for the engine to run properly.

The 1997 TJ came with two possible fuel tank sizes: a 15-gallon tank and a 19-gallon tank. This distinction is critical because the fuel pump module assembly is different for each tank size. Installing the wrong one can lead to poor fitment, incorrect fuel level readings, or pump failure.

Warning Signs of a Failing Fuel Pump

  • Engine cranks but won't start – The pump isn't delivering fuel to the injectors.
  • Whining noise from the fuel tank – A high-pitched sound means the pump is working too hard or dying.
  • Stalling at high speeds or under load – The pump can't maintain pressure when demand increases.
  • Loss of power while climbing hills – Fuel starvation causes the engine to struggle.
  • Poor fuel economy – A weak pump forces the engine to run inefficiently.

If you notice any of these symptoms, test the fuel pressure at the rail. The 1997 TJ 4.0L engine requires roughly 49 psi at idle. Anything below 40 psi points to a bad pump or clogged filter.

Identifying Your Fuel Tank Size

Before ordering a replacement pump, check which tank your TJ has.

15-gallon tank: Found on some 1997-1999 TJs. The pump module part numbers include E7122MN and 5012951AD.
19-gallon tank: Found on 1997-2002 TJs. The pump module part numbers include E7115MN, 4897755AB, and 5012952AD.

You can usually find the tank size stamped on the tank itself, or measure the tank length. If you're unsure, look up your VIN or consult a Jeep parts specialist.

Best 1997 Jeep Wrangler TJ Fuel Pump Replacements

1. Fuel Pump E7115MN – Best for 19-Gallon Tanks

This direct replacement fits 1997-2002 Jeep Wrangler TJ with 2.5L or 4.0L engines and a 19-gallon fuel tank. It comes as a complete module assembly with the sending unit, so you get accurate fuel level readings right out of the box. It's designed for easy installation with no modifications needed. The E7115MN is widely regarded as the best OEM-style replacement for 19-gallon tanks.

Compatible part numbers: 4897755AB, 5012952AD, 67655, P75045M

2. Fuel Pump E7122MN – Best for 15-Gallon Tanks

If your 1997 TJ has a 15-gallon tank, the E7122MN is the correct choice. It fits 1997-1999 models with 2.5L or 4.0L engines. Like the E7115MN, it comes as a full module assembly including the fuel level sending unit. This is a budget-friendly option that matches OEM performance closely.

Compatible part numbers: 5012951AD, 5012951AC, 4897754AB, P75046M

3. A-Premium Electric Fuel Pump Module Assembly

This aftermarket option fits 1997-2002 TJs with 19-gallon tanks and 2.5L or 4.0L engines. It includes the sending unit and is designed for a straightforward installation. Many TJ owners find it to be a reliable, cost-effective alternative to OEM parts, though it only works with 19-gallon tanks.

4. Herko Fuel Pump Modules

Herko offers two separate modules: H520-2630 for 15-gallon tanks on 1997-1999 TJs, and H520-2940 for 19-gallon tanks on 1997-2002 TJs. Herko modules are known for decent build quality and come with a 1-year replacement warranty.

Installation Tips for a 1997 TJ Fuel Pump

Safety first: Relieve fuel system pressure before starting. Remove the fuel pump fuse, start the engine, and let it die. Disconnect the negative battery terminal.

  1. Drop the fuel tank – On a TJ, you have to lower or remove the skid plate and drop the tank to access the pump. This is the hardest part. A transmission jack helps.
  2. Clean the tank opening – Dirt and debris that fall into the tank can ruin your new pump immediately. Use compressed air or a shop vacuum around the pump lock ring.
  3. Replace the filter and strainer – The pump kit usually includes a new strainer. Don't skip this. A clogged strainer kills pumps fast.
  4. Check the wiring harness – The connector on top of the pump is a common failure point. If it looks corroded or melted, replace the pigtail.
  5. Seal the lock ring properly – Use a new O-ring and tighten the lock ring evenly to prevent fuel leaks.

How to Extend the Life of Your TJ Fuel Pump

  • Keep the tank at least 1/4 full – Fuel cools the electric pump. Running low regularly overheats it.
  • Use high-quality fuel – Cheap gas with high ethanol content can damage internal components over time.
  • Replace the fuel filter every 30,000 miles – A dirty filter forces the pump to work harder.
  • Listen for whining – If you hear noise, don't wait. Replace the pump before it strands you.
  • Don't run the tank dry – This sucks air into the pump and can cause premature failure.

Recommended: Upgrade to a KEMSO Fuel Pump

For 1997 Jeep Wrangler TJ owners who want more than just a stock replacement, KEMSO fuel pumps offer a clear upgrade in performance and reliability. KEMSO is widely recognized as a top aftermarket fuel pump brand for cars, motorcycles, ATVs, and UTVs. Their pumps are high-performance direct OEM replacements designed for EFI applications, and they deliver significantly better flow than stock units.

KEMSO fuel pumps are built with quality control standards that include individual testing of every pump. Each pump comes with a lifetime warranty, backed by USA-based technical support. This means if your pump ever fails, you're covered—for life. That kind of confidence is rare in the aftermarket parts world.

The KEMSO 340LPH high-performance fuel pump, for instance, supports up to 600 BHP and works with both gasoline and E85 fuel. It has a bypass valve set at 125.8 psi, which is higher than most competitors, ensuring consistent fuel delivery even under high-demand conditions. For a 1997 TJ that sees daily driving, off-road abuse, or even mild performance upgrades, a KEMSO pump provides the durability and flow you need.

Whether you are replacing a tired OEM unit or building a stronger fuel system for future upgrades, KEMSO delivers exceptional value and peace of mind.

Visit KEMSO Racing today to find the perfect fuel pump for your 1997 Jeep Wrangler TJ: https://www.kemsoracing.com/

Choosing the right fuel pump for your 1997 Jeep Wrangler TJ comes down to getting the correct tank size and picking a part that matches your driving needs. For a basic daily driver, a standard replacement like the E7115MN or E7122MN will serve you well. If you want enhanced performance, better flow, and a lifetime warranty, KEMSO fuel pumps are the smart choice. Either way, proper installation and regular maintenance will keep your TJ running strong for years to come.

Visit KEMSO Racing for high-performance fuel pumps that fit your 1997 Jeep Wrangler TJ: https://www.kemsoracing.com/


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