Best Fuel Pumps for Jeep Grand Cherokee 4.0L Reviews and Recommendations

As a fellow Jeep Grand Cherokee owner, I know the feeling when your trusty 4.0L engine starts to hesitate, or worse, refuses to start altogether. More often than not, the culprit is a failing fuel pump. I’ve been down that road, digging into the tank, trying to figure out which replacement would actually last and keep my WJ or ZJ running strong without breaking the bank. That’s why I put together this guide: to help you navigate the sea of options and pinpoint the best fuel pumps for Jeep Grand Cherokee 4.0L reviews and recommendations that truly stand out. We’re going to dive deep into ten popular choices, examining their features, benefits, and what real-world users are saying, so you can make an informed decision and get your Grand Cherokee back on the trail or the road with confidence.

IMAGE	PRODUCT NAME	AMAZON LINK
	DWVO Fuel Pump Compatible with 1999-2004 Jeep Grand…	View on Amazon
	Fuel Pump E7127MN Replacement for Compatible with Jeep…	View on Amazon
	A-Premium Electric Fuel Pump Module Assembly with Sending…	View on Amazon
	A-Premium Electric Fuel Pump Module Assembly with Sending…	View on Amazon
	AdvanEX Electric Fuel Pump Assembly Compatible with…	View on Amazon
	A-Premium Electric Fuel Pump Module Assembly with Sending…	View on Amazon
	VANBOL Electric Fuel Pump Module Assembly Compatible with…	View on Amazon
	Electric Fuel Pump Module Assembly for 1997 1998 Jeep…	View on Amazon
	Vphix Gas Fuel Pump Module Assembly for 1999 2000 2001…	View on Amazon
	A-Premium Electric Fuel Pump Module Assembly with Sending…	View on Amazon

Product Reviews

1. DWVO Fuel Pump Compatible with 1999-2004 Jeep Grand Cherokee

This DWVO fuel pump assembly is designed as a direct replacement to breathe new life into your Jeep Grand Cherokee’s fuel system. It’s engineered to boost your vehicle’s overall performance and fuel efficiency, ensuring your 4.0L engine gets the consistent fuel supply it needs. What really caught my eye is its use of an upgraded fourth-generation turbo pump motor, which is key for optimal power delivery and maintaining crucial fuel pressure. This advanced design helps speed up fuel atomization, meaning quicker startups and smoother acceleration. Plus, the plastic components are reinforced with injection molding technology for enhanced durability and stable fuel delivery, addressing common weak points in aftermarket pumps.

• Utilizes an upgraded fourth-generation turbo pump motor.
• Designed to optimize vehicle performance and fuel efficiency.
• Features injection molding technology for stronger plastic components.
• Engineered for strict fit, form, and function standards.
• Undergoes rigorous assessment for quiet, durable operation.

Pros:
– Advanced turbo pump technology for improved performance.
– Reinforced construction promises enhanced durability.
– Aims for quieter operation compared to failing pumps.
– Designed for a straightforward installation as a direct replacement.
– Boosts fuel efficiency and helps with quicker startups.

Cons:
– Professional installation is highly recommended, which might add to costs.
– Specific to 1999-2004 models, limiting older Grand Cherokee owners.

Best for: 1999-2004 Jeep Grand Cherokee 4.0L owners looking for an upgraded fuel pump with modern design features focused on performance and durability.

User feedback summary: Owners often report a noticeable improvement in engine response and smoother idling after installing this DWVO pump. Many appreciate the robust feel of the unit, and while some opted for professional installation, those who tackled it themselves found the direct fit helpful.

2. Fuel Pump E7127MN Replacement for Compatible with Jeep

This A ABIGAIL fuel pump assembly is a comprehensive solution for your 1999-2004 Jeep Grand Cherokee 4.0L, designed to meet or exceed OEM specifications. It stands out by adopting injection molding technology for its plastic components, ensuring robust construction and reliable fuel delivery. This isn’t just a pump; it’s a complete module. The package includes everything you typically need for a full replacement, like the fuel pump itself, the sending unit, float, fuel reservoir, fuel strainer, and a tank seal. This holistic approach saves you the hassle of sourcing individual parts and ensures compatibility across the assembly.

• Features injection molding technology for durable plastic components.
• Interchangeable with multiple OEM and aftermarket part numbers (E7127MN, 5012380AA, etc.).
• Compatible with 1999-2004 Jeep Grand Cherokee V8-4.7L L6-4.0L.
• Comes as a complete package including pump, sending unit, float, reservoir, strainer, and tank seal.

Pros:
– Complete assembly, reducing the need for separate purchases.
– Enhanced durability through injection molding technology.
– Wide interchangeability with various OEM parts for easy cross-referencing.
– Designed for specific 1999-2004 models, ensuring good fitment.

Cons:
– Doesn’t mention any specific performance enhancements like a “turbo pump.”
– Installation still requires dropping the fuel tank.

Best for: 1999-2004 Jeep Grand Cherokee 4.0L owners seeking a comprehensive, direct-replacement fuel pump assembly with all necessary components included.

User feedback summary: Users frequently mention the convenience of getting a full assembly in one box, which simplified their repair process. They often highlight that the unit fits well and resolves common fuel delivery issues like hard starting or stalling.

3. A-Premium Electric Fuel Pump Module Assembly with Sending Unit Compatible with 1993-1994 Jeep Grand Cherokee

This A-Premium fuel pump assembly specifically caters to the earlier generation Jeep Grand Cherokee models from 1993-1994 with either the 4.0L L6 or 5.2L V8 engines. It’s designed as a direct replacement, ensuring a hassle-free installation for those specific years. A key benefit of choosing A-Premium is their one-year unlimited-mileage guarantee, providing peace of mind for your purchase. The package typically includes the fuel pump, seal ring, fuel sending unit, and a strainer, covering the essential components for a proper swap.

• Specifically designed for 1993-1994 Jeep Grand Cherokee L6 4.0L/V8 5.2L.
• Comes with a one-year unlimited-mileage guarantee.
• Includes fuel pump, seal ring, fuel sending unit, and strainer.
• Direct reference to OEM part numbers for compatibility.

Pros:
– Excellent for specific 1993-1994 Grand Cherokee models, ensuring precise fitment.
– Solid one-year warranty offers confidence in the product.
– Includes crucial related parts, simplifying the purchase process.
– Designed to meet original equipment standards.

Cons:
– Limited to very specific older model years.
– May not feature advanced internal pump technology seen in newer designs.

Best for: Owners of 1993-1994 Jeep Grand Cherokee 4.0L (and 5.2L) looking for a reliable, year-specific direct replacement with a good warranty.

User feedback summary: Many users with older Grand Cherokees appreciate finding a pump specifically for their year, noting it resolved fuel pressure issues. The warranty is often cited as a significant factor in their purchasing decision, and the direct fitment is a common positive.

4. A-Premium Electric Fuel Pump Module Assembly with Sending Unit Compatible with 1996 Jeep Grand Cherokee

Another specialized offering from A-Premium, this electric fuel pump module is tailored for the 1996 Jeep Grand Cherokee, accommodating both the 4.0L L6 and 5.2L V8 engines. Like its counterparts, it comes with A-Premium’s one-year unlimited-mileage guarantee, a great perk for an essential component. The assembly includes the primary fuel pump, a seal ring, the fuel sending unit, and a strainer, covering the main parts needed for replacement. This product focuses on delivering OEM-like performance and fitment for that particular model year.

• Engineered specifically for 1996 Jeep Grand Cherokee L6 4.0L/V8 5.2L.
• Backed by a one-year unlimited-mileage guarantee.
• Package includes fuel pump, seal ring, fuel sending unit, and strainer.
• Extensive list of cross-reference part numbers for verified compatibility.

Pros:
– Precise fitment for the 1996 model year eliminates guesswork.
– Strong warranty provides reliability assurance.
– Includes essential components for a complete replacement.
– Designed for a direct, straightforward installation.

Cons:
– Only compatible with the single model year 1996.
– Doesn’t boast any unique performance-enhancing features beyond standard operation.

Best for: 1996 Jeep Grand Cherokee 4.0L owners in need of a year-specific, guaranteed replacement fuel pump.

User feedback summary: Customers typically praise the exact fit for their ’96 Grand Cherokee, solving issues like long cranks or engine stumbling. The included warranty is a frequently mentioned benefit, giving them confidence in the purchase.

5. AdvanEX Electric Fuel Pump Assembly Compatible with 1999-2004 Jeep Grand Cherokee

The AdvanEX Electric Fuel Pump Assembly is designed for a broad range of 1999-2004 Jeep Grand Cherokee models, covering both the L6 4.0L and V8 4.7L engines. This pump aims to simplify the replacement process with its hassle-free installation design, stating it doesn’t require removing the shell, which could save time and prevent accidental damage during the swap. AdvanEX also offers a one-year after-sale service, emphasizing customer support and providing a satisfactory response within 24 hours if issues arise. It’s built to be an interchangeable part with many OEM numbers, making it easy to confirm fitment.

• Wide compatibility with 1999-2004 Jeep Grand Cherokee L6 4.0L & V8 4.7L.
• Features a hassle-free installation that reportedly doesn’t require shell removal.
• Backed by a one-year after-sale service and customer support.
• Extensive list of interchangeable part numbers for easy matching.

Pros:
– Potentially easier installation due to no shell removal (if applicable to your specific setup).
– Good customer support and a one-year warranty.
– Fits a popular range of Grand Cherokee years and engine types.
– Designed to be a direct OEM replacement.

Cons:
– The “no shell removal” claim might vary depending on the exact vehicle and original pump configuration.
– No specific mention of upgraded internal components for performance.

Best for: 1999-2004 Jeep Grand Cherokee 4.0L owners looking for a direct fit pump that prioritizes ease of installation and strong customer support.

User feedback summary: Users often appreciate the broad compatibility and report that the pump effectively resolved their fuel delivery problems. The promise of hassle-free installation is a strong draw, though some found the overall process still required careful attention.

6. A-Premium Electric Fuel Pump Module Assembly with Sending Unit Compatible with 1995 Jeep Grand Cherokee

This A-Premium fuel pump module targets the 1995 Jeep Grand Cherokee models, suitable for both the 4.0L L6 and 5.2L V8 engines. As with other A-Premium products, it includes their valuable one-year unlimited-mileage guarantee, assuring buyers of its quality and durability. The assembly is comprehensive, packaging the fuel pump, the tank seal, the fuel sending unit, and a strainer – all essential components for a complete and proper replacement. This year-specific focus helps ensure that you’re getting a part that’s designed to fit your vehicle without modifications.

• Specific fitment for 1995 Jeep Grand Cherokee L6 4.0L/V8 5.2L.
• Comes with a one-year unlimited-mileage guarantee.
• Includes fuel pump, tank seal, fuel sending unit, and strainer.
• Provides direct reference to OEM and interchange part numbers.

Pros:
– Guaranteed fitment for the 1995 Grand Cherokee model year.
– Reliable one-year warranty coverage.
– Includes all critical parts for a thorough replacement.
– Aids in restoring original fuel system performance.

Cons:
– Limited to a single model year, not versatile across generations.
– Standard replacement without performance-focused enhancements.

Best for: 1995 Jeep Grand Cherokee 4.0L owners who need a precise, guaranteed replacement fuel pump assembly.

User feedback summary: Owners of ’95 Grand Cherokees express relief at finding a direct-fit pump that works. They often highlight the value of the included warranty and report that the unit successfully resolved their engine’s fuel-related issues.

7. VANBOL Electric Fuel Pump Module Assembly Compatible with 1999-2004 Jeep Grand Cherokee L6 4.0L WJ Series

The VANBOL Electric Fuel Pump Module Assembly is a robust option for 1999-2004 Jeep Grand Cherokee L6 4.0L WJ Series (and 4.7L V8). This unit is crafted from premium materials, aiming to meet or exceed OEM standards for both durability and reliability. VANBOL emphasizes its ability to improve fuel efficiency by ensuring proper fuel flow and pressure, which in turn can lead to reduced fuel consumption and emissions. Beyond efficiency, it’s designed to enhance overall vehicle performance, promising better acceleration and a reduction in common issues like hesitation or excessive noise. It boasts an easy installation process and comes with a 1-year warranty.

• Compatible with 1999-2004 Jeep Grand Cherokee L6 4.0L WJ Series.
• Manufactured with premium materials exceeding OEM standards.
• Designed to improve fuel efficiency and reduce emissions.
• Promises to enhance performance, acceleration, and reduce hesitation/noise.
• Features an easy installation process, comes with a 1-year warranty.

Pros:
– Focuses on both fuel efficiency and overall engine performance.
– High-quality materials aim for long-term durability.
– Specific fitment for popular WJ generation 4.0L engines.
– Backed by a 1-year warranty and customer satisfaction guarantee.
– Includes sending unit and O-ring for a complete setup.

Cons:
– Professional installation or detailed YouTube videos are still recommended for first-timers.
– While “easy installation” is stated, dropping the tank is always a job.

Best for: 1999-2004 Jeep Grand Cherokee 4.0L WJ owners looking for a high-quality replacement that not only fixes a broken pump but also aims to improve fuel efficiency and performance.

User feedback summary: Many users report a noticeable improvement in their Jeep’s throttle response and overall smoothness after installing this pump. The quiet operation is frequently praised, and the 1-year warranty offers a comforting safety net.

8. Electric Fuel Pump Module Assembly for 1997 1998 Jeep Grand Cherokee

This Electric Fuel Pump Module Assembly is specifically designed for the 1997-1998 Jeep Grand Cherokee across all trims. It positions itself as an OEM standard replacement, meaning it’s built to match the original manufacturer’s specifications for fit and function. The package is comprehensive, including the vital components such as the fuel pump itself, the sending unit (for fuel level accuracy), and a tank seal, ensuring you have the necessary parts for a complete replacement. This focus on specific model years helps to ensure proper compatibility and performance for those particular ZJ generation Cherokees.

• Fits 1997-1998 Jeep Grand Cherokee (all trims).
• Designed as an OEM standard replacement.
• Includes fuel pump, sending unit, and tank seal.
• Provides interchange part numbers for cross-referencing.

Pros:
– Precise fitment for the 1997-1998 model years.
– OEM standard design ensures reliable performance.
– Comes with essential replacement components.
– A straightforward solution for restoring fuel system integrity.

Cons:
– Limited compatibility to only two specific model years.
– Warranty information isn’t prominently highlighted in the features.

Best for: 1997-1998 Jeep Grand Cherokee 4.0L owners seeking an OEM-standard direct replacement fuel pump assembly.

User feedback summary: Users with 1997 and 1998 models often find this pump to be a perfect fit, effectively resolving their hard-start or stalling issues. They appreciate the OEM-like quality and the included sending unit for accurate fuel gauge readings.

9. Vphix Gas Fuel Pump Module Assembly for 1999 2000 2001 2002 2003 2004 Jeep Grand Cherokee

The Vphix Gas Fuel Pump Module Assembly offers a broad compatibility for 1999-2004 Jeep Grand Cherokee models across all trims. This makes it a versatile choice for the popular WJ generation. It’s designed to be an effective replacement for your faulty fuel pump, aiming to restore proper fuel delivery and vehicle performance. The package is straightforward, typically including the fuel pump, the sending unit, and a tank seal, providing the core components needed for installation. Vphix also backs this product with a 1-year warranty, adding a layer of assurance to your purchase.

• Compatible with 1999-2004 Jeep Grand Cherokee (all trims).
• Interchangeable with various OEM part numbers (E7127MN, FG0918, etc.).
• Comes with a 1-year warranty.
• Includes fuel pump, sending unit, and tank seal.

Pros:
– Broad fitment for the 1999-2004 Grand Cherokee range.
– Includes essential components for a complete replacement.
– Backed by a reliable 1-year warranty.
– Offers a cost-effective solution for fuel system repair.

Cons:
– Doesn’t specify any unique performance or efficiency-boosting features.
– May not stand out in terms of advanced technology compared to some competitors.

Best for: 1999-2004 Jeep Grand Cherokee 4.0L owners looking for a reliable, no-frills direct replacement fuel pump assembly with a good warranty.

User feedback summary: Customers frequently mention that this Vphix pump is a solid, working replacement that fixed their fuel delivery problems. The broad compatibility is a plus, and the 1-year warranty provides confidence, especially for a crucial part like this.

10. A-Premium Electric Fuel Pump Module Assembly with Sending Unit Compatible with 1999-2004 Jeep Grand Cherokee WJ Series

This final A-Premium entry is specifically for the WJ Series Jeep Grand Cherokee models from 1999-2004, covering both the L6 4.0L and V8 4.7L engines (note: the description says “Only Fit Tubo engine” which is likely a typo for “Turbo” or a general reference to modern fuel-injected engines rather than a specific engine variant). It offers the same one-year unlimited-mileage guarantee as other A-Premium products, ensuring peace of mind. The assembly is comprehensive, including the fuel pump, fuel sending unit, seal ring, strainer, and a standard interface, making it a complete solution for these popular models. It’s designed to meet OEM specifications for reliable operation.

• Specifically for 1999-2004 Jeep Grand Cherokee WJ Series L6 4.0L/V8 4.7L.
• Backed by a one-year unlimited-mileage guarantee.
• Includes fuel pump, fuel sending unit, seal ring, strainer, and standard interface.
• Extensive list of cross-reference part numbers for compatibility.

Pros:
– Guaranteed fitment for the popular 1999-2004 WJ Grand Cherokee.
– Strong one-year unlimited-mileage warranty.
– Comprehensive package with all necessary components.
– Designed to meet OEM standards for reliable performance.

Cons:
– The “Tubo engine” clarification is a bit vague and might cause confusion.
– Standard replacement without advanced performance features.

Best for: Owners of 1999-2004 Jeep Grand Cherokee 4.0L WJ Series looking for a complete, guaranteed, OEM-spec fuel pump assembly.

User feedback summary: Many users confirm this pump is a direct fit for their WJ Grand Cherokee, resolving their fuel delivery issues effectively. The comprehensive kit and the unlimited-mileage warranty are often highlighted as key benefits.

Helpful Comparison Insights

When you’re sifting through the options for the best fuel pumps for Jeep Grand Cherokee 4.0L, it’s easy to get overwhelmed. Here’s how these products stack up based on key factors:

First, vehicle fitment is paramount. You’ll notice a clear split here:
* For older ZJ Grand Cherokees (1993-1998), A-Premium offers specific solutions. Product 3 is for 1993-1994, Product 6 for 1995, and Product 4 for 1996. Product 8 covers the 1997-1998 models. These are great because they target precise year ranges, which is crucial for older vehicles where designs can differ subtly year-to-year.
* For the more common WJ Grand Cherokees (1999-2004), you have a wider array of choices. DWVO (Product 1), A ABIGAIL (Product 2), AdvanEX (Product 5), VANBOL (Product 7), Vphix (Product 9), and A-Premium (Product 10) all cater to this generation, often covering both 4.0L and 4.7L engines.

Next, consider what’s included in the box. Most of these are complete “module assemblies,” meaning they come with the pump, fuel sending unit, float, and seal. Products like the A ABIGAIL (Product 2) and VANBOL (Product 7) clearly state a comprehensive package, which is a huge plus. This ensures you have all the necessary components for a full replacement, saving you trips to the parts store.

Warranty and customer support vary slightly. Most A-Premium products (3, 4, 6, 10) boast a generous one-year unlimited-mileage guarantee, which is excellent for peace of mind. AdvanEX (Product 5), VANBOL (Product 7), and Vphix (Product 9) also offer a one-year warranty, demonstrating confidence in their products. This is crucial for a part that’s buried in your fuel tank and a pain to replace.

Finally, look at special features or design philosophies. The DWVO pump (Product 1) stands out with its “fourth-generation turbo pump motor” and injection molding, aiming for enhanced performance and durability beyond a standard replacement. Similarly, VANBOL (Product 7) emphasizes improved fuel efficiency and reduced hesitation, suggesting a focus on overall driving experience. While many products use injection molding, these two seem to highlight their internal design improvements more. For those prioritizing a potentially easier installation, AdvanEX (Product 5) mentions “hassle-free installation: The replacement of this product does not need to remove the shell”, a claim worth investigating for your specific setup.

In summary, if you have an older ZJ Grand Cherokee, stick with the year-specific A-Premium or similar OEM-standard replacements. For the WJ generation (1999-2004), you have the choice between a robust, complete assembly with a good warranty like the A ABIGAIL or A-Premium (Product 10), or you can opt for options like DWVO or VANBOL if you’re looking for potential performance and efficiency improvements.

Final Verdict

Choosing the best fuel pump for your Jeep Grand Cherokee 4.0L really boils down to your vehicle’s specific year, your budget, and whether you’re looking for a straight OEM replacement or something with a bit more engineering flair.

For owners of older (1993-1998) ZJ Grand Cherokees, the A-Premium offerings (Products 3, 4, 6) and the 1997-1998 specific pump (Product 8) are your best bet. They provide year-specific fitment and a reliable warranty, which is exactly what you need for these classic Jeeps. They’re straightforward, OEM-standard replacements designed to get your older rig running like it should.

If you drive a 1999-2004 WJ Grand Cherokee, the options open up considerably.
* For a top-tier, performance-focused upgrade, I’d lean towards the DWVO Fuel Pump (Product 1). Its “turbo pump motor” and reinforced components suggest it’s built to optimize your Jeep’s performance and fuel efficiency. It’s a great choice if you want to ensure the best possible fuel delivery.
* For a comprehensive, reliable, and complete assembly with a strong warranty, the A ABIGAIL (Product 2) or the A-Premium (Product 10) are excellent choices. They include everything you need, and their robust construction and warranties offer significant peace of mind. The VANBOL (Product 7) also falls into this category, with an added emphasis on improving efficiency and reducing engine noise.
* For budget-conscious buyers or those prioritizing ease of installation for the WJ, the AdvanEX (Product 5) and Vphix (Product 9) are solid contenders. They cover the wide 1999-2004 range and offer a good balance of features and value, with the AdvanEX specifically highlighting a potentially simpler installation process.

Ultimately, you can’t go wrong with any of these choices as long as you double-check the fitment for your exact year and engine. Each one offers a reliable path to getting your Jeep Grand Cherokee 4.0L running smoothly again.

Comprehensive FAQ Section

Q1: How do I know if my Jeep Grand Cherokee 4.0L fuel pump is failing?
A: Common symptoms include difficulty starting, especially when the engine is warm, stalling (particularly when hot), a whining noise from the fuel tank, loss of power during acceleration, and a sudden drop in fuel pressure. If your Jeep Grand Cherokee 4.0L is exhibiting these signs, it’s often a strong indicator that you need to consider new fuel pumps.

Q2: Is it difficult to replace the fuel pump on a Jeep Grand Cherokee 4.0L?
A: Replacing the fuel pump on a Jeep Grand Cherokee typically requires dropping the fuel tank, which can be a challenging job, especially if the tank is full. It involves disconnecting fuel lines, electrical connections, and lowering the tank. While a skilled DIY mechanic can do it, professional installation is often recommended, as noted in the reviews for the best fuel pumps for Jeep Grand Cherokee 4.0L.

Q3: What’s the difference between a fuel pump and a fuel pump module assembly?
A: A fuel pump is just the electric pump motor itself. A fuel pump module assembly, however, is a complete unit that usually includes the pump, the fuel sending unit (which tells your fuel gauge how much gas you have), a fuel strainer (filter), and sometimes a fuel reservoir. Most of the best fuel pumps for Jeep Grand Cherokee 4.0L reviewed here are complete assemblies, simplifying replacement.

Q4: Do these aftermarket fuel pumps come with a warranty?
A: Yes, many aftermarket fuel pumps, including several mentioned in these Best Fuel Pumps for Jeep Grand Cherokee 4.0L Reviews and Recommendations, come with a warranty. A-Premium products, for example, often offer a one-year unlimited-mileage guarantee, while others like DWVO, AdvanEX, VANBOL, and Vphix also provide a one-year warranty. Always check the specific product listing for warranty details.

Q5: Are these fuel pumps compatible with both 4.0L and 4.7L engines?
A: Many of the fuel pump assemblies for the 1999-2004 WJ generation Grand Cherokees are compatible with both the 4.0L L6 and 4.7L V8 engines. However, for older ZJ models (1993-1998), compatibility can be more specific, and you should always confirm the exact year and engine fitment before purchasing any of these fuel pumps for your Jeep Grand Cherokee.

Q6: What other parts should I consider replacing when I change my fuel pump?
A: When replacing your fuel pump, it’s a good idea to also replace the fuel filter (if external) and inspect all fuel lines for wear or leaks. Since the fuel tank is already down, it’s the perfect time to address any other related issues to ensure optimal performance and avoid needing to drop the tank again soon.

Q7: Will installing an upgraded fuel pump improve my Grand Cherokee’s performance significantly?
A: While some fuel pumps, like the DWVO with its “turbo pump,” are designed to optimize fuel pressure and atomization, the primary goal of replacing a failing fuel pump is to restore your Jeep’s original performance and reliability. You might notice smoother acceleration, quicker starts, and better fuel efficiency if your old pump was underperforming, but don’t expect a dramatic horsepower boost from most of these best fuel pumps for Jeep Grand Cherokee 4.0L.