Best Spark Plugs for Jeep 4.0 Review in 2021

In this article, we have put together detailed information about best spark plugs for Jeep 4.0. For a quick overview, we have shown you in the table before a clear comparison of products in this category. In addition, we have listed below the current list of hot items, additional sources, and relevant videos. Our recommendation is based on aggregated data from multiple sources. These include, for example, consumer association testing reports, field reports, and reviews from real customers.

Spark plugs are an integral part of the internal combustion Jeep 4.0 engine and their malfunction may not properly ignite the spark that serves to ignite the mixture of air and gasoline in the combustion chamber of the engine. In any case, after about 30,000 miles it is always advisable to replace them, even if they seem to be in order.

Frequently bought together
Ignition Coil Pack - Jeep 4.0L
Ignition Coil Pack - Jeep 4.0L
Warranty - 24,000 mile
If your Jeep 4.0 has begun to misfire, idle erratically, or hesitate under acceleration a bad coil pack or spark plugs.
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Best Spark Plugs for Jeep 4.0 Engine (Updated July, 2021)

ImageProduct 
Best Choice
Champion Copper Plus 438 review

Champion Copper Plus 438

  • Performance and Durability
  • Have a longer life
  • Superior corrosion resistance

Also great
Accel ACC TST16 review

Accel ACC TST16

  • Complete Super Tune Kit
  • High Performance Cap And Rotor
  • For Jeep 4.0L 1994-1999

Best Value
Autolite XP985 Iridium XP review

Autolite XP985 Iridium XP

  • Iridium-enhanced platinum alloy 0.6mm
  • With virtually no gap erosion
  • Designed for better overall durability

Non-Slip Grip
Bosch 9656 Double Iridium review

Bosch 9656 Double Iridium

  • Double Iridium firing pin
  • Provide 4X longer service life
  • Superior ignitability and performance

Ergonomic Fit
NGK 3459 V-Power review

NGK 3459 V-Power

  • Ease of installation and removal
  • Providing great ignitability and performance
  • Have an alumina silicate ceramic insulator

Unrivaled Power
E3 Spark Plugs E3.58 review

E3 Spark Plugs E3.58

  • Designed to increase power
  • Increase turbulence in the cylinder
  • Provides optimal performance

Bought Together
Permatex 80078 Anti-Seize review

Permatex 80078 Anti-Seize

  • Enables easier disassembly of parts
  • A highly refined blend of aluminum, copper, and graphite
  • lubricants that is salt, corrosion, and moisture resistant

Best Spark Plugs for 4.0 Jeep Review


1. Champion 438 – Best Spark Plugs for 4.0 Jeep


Champion Copper Plus 438

The feature of this Champion spark plug is that it has a copper core electrode that provides increased conductivity and as a result, transfers heat faster.

Champion Copper Plus Spark Plug provides more efficacious performance, that is why are quite popular spark plugs. These products are characterized by stable operation, including at high engine speeds. For lovers of fast driving, they are unlikely to be suitable, but for the average car enthusiast, they will be optimal.


PROS:
  • Top quality
  • Easy to install
  • Excellent durability
CONS:
  • Only 1 unit in pack



2. Accel ACC TST16 – Truck Super Tune Up Kit For Jeep 4.0L


Accel ACC TST16

Whatever you need to upgrade your Jeep is Accel ACC TST16 Truck Super Tune Up set ! The kit consists of a high-performance cap as well as a rotor. A set of 8mm Extreme 9000 Spiral Core cables. This package additionally consists of the ACCEL traditional copper core spark plugs to discharge your engine up.


PROS:
  • Easy installation
  • 8mm Spiral Core Wires
  • Accel Classic Core Plugs
CONS:
  • None found yet



3. Autolite XP985 – Recommended Spark Plugs for Jeep 4.0


Autolite XP985 Iridium XP

The spark of Autolite XP985 Iridium XP is powerful enough to ensure the ignition of a fuel-air mixture of even low quality. The electrode has a nickel coating so that the spark plug works stably throughout its entire period of operation.

The manufacturer recommends replacing the plugs every 30 thousand kilometers, but when using gasoline with a high octane number, this figure can almost double. Candles do not accumulate carbon deposits on the surface, withstand physical and thermal stress well, fit tightly, which significantly reduces oil consumption, and it is also possible to achieve some fuel savings.


PROS:
  • Saving oil and fuel
  • High quality workmanship
  • Long service life
CONS:
  • Performance enhancement possibly unnoticeable



4. Bosch 9656 – Best Spark Plugs for 4.0 Jeep Wrangler


Bosch 9656 Double Iridium Spark Plug

These spark plugs characterized by durability – from one replacement to another, a car can travel up to 55-60 thousand kilometers. Such indicators can be achieved largely due to the presence of platinum sputtering. The core of this Bosch spark plug is quite thin and is made in such a way that it is almost flush with the insulator made of ceramic materials. This makes it possible to give the spark the appearance of a plasma discharge, which will behave stably even under the condition of a weak voltage in the vehicle’s electrical network.

The quality of the products is top-notch, like most of such products made in Germany. Due to the fact that these spark plugs are quite popular on the market, they are often forged, but it is very easy to identify counterfeit – by the quality of the insulator, the reduced distance between the electrodes, and a number of other factors.


PROS:
  • Works well even at low voltages
  • The original design of the central electrode
  • Have very high quality
CONS:
  • Fuel consumption increases slightly



5. NGK 3459 V-Power – Power Spark Plugs for Jeep TJ 4.0L


NGK 3459 V-Power

Notably, NGK 3459 V-Power spark plugs provide better ignition with less voltage in the system, which will provide more power and efficiency as well as less stress on other ignition system components. A long list of positive owner reviews suggests that these plugs are the best choice, and they are definitely worth the money.

V-Power spark plugs feature a unique electrode design with an integral recess that creates a unique spark. It helps to increase the engine resource and stabilize the quality of combustion of the mixture, and thanks to the self-cleaning ability, the electrodes have minimal wear, a clean surface, and a long resource.


PROS:
  • Saving oil and fuel
  • Spark stability
  • Long service life
CONS:
  • Has a high price



6. E3 Spark Plugs E3.58 – Best Spark Plugs for Jeep Cherokee 4.0


E3 Spark Plugs E3.58

E3 spark plugs have launched a range of premium iridium spark plugs. Thanks to the latest technology, they are designed for a very long service life, stable idle speed, smooth operation, and maximum efficiency. However, they meet or exceed factory specifications for quality and durability.

More and more new Jeeps are using these spark plugs, and the E3 Spark Plugs E3.58 model allows this technology to work on any engine. They have a diamond-shaped ground electrode and a full-size center electrode for faster heat transfer and increased turbulence inside the combustion chamber.


PROS:
  • Highest quality
  • Helps reduce fuel consumption
  • Quicker and cleaner firing
CONS:
  • Some customers had problems with faulty spark plugs

Buyer’s Guide

Spark plugs need to be changed in a timely manner, without waiting for their failure. Ignition misfires in any of the cylinders will not go unnoticed for the catalytic converter of the exhaust. And the price of a neutralizer is incomparable with the cost of a set of spark plugs. But even when the spark plugs are working properly, do not forget about their spark gap, which increases over time. Together with it, the load on the ignition coils also increases, and these parts are also not cheap. Many vehicle owners do not even think that there is a direct connection between old spark plugs and a “suddenly” dead coil.

Changing spark plugs is a necessity to keep an engine running. It is a car maintenance that must be performed to help prevent any engine failure.Without spark plugs, the engine will not run. There will be no spark to ignite the fuel in the engine chamber. Therefore, there will be no power, and the engine will not turn.

How to remove spark plugs?

Jeep Spark Plug Remove and InstallFirst, you need a 3/8 inch ratchet, spark plug sockets, and a long 3/8extension. First, connect the spark plug sockets onto the extension. Next connect the spark extension onto the ratchet.

Remove the spark plug wires and remember to mark them according to the cylinder. Use the ratchet with the socket and place it carefully onto the spark plug. Remove the spark plug by going counter clockwise. Carefully to remove it slowly and not break the spark plug in the chamber. It will become costly if this happen as the head needs to be removed. After removing the spark plug check the condition of the spark plug.

When to change spark plugs?

Symptoms of Bad Spark PlugsSpark plug should be changed every 60,000-100,000 miles depending on the manufacturer specification. Spark plug should also be changed when the engine is no longer running efficient. Some signs include, engine misire, inefficient engine, poor gas mileage, car running erratic etc.

How to check the condition of the spark plugs?

Checking the condition of the spark plugs is very important. A spark plug should be clean and free of oil when removed from the engine. There should be no signs of crack, burned, oiled.
Here is a list of common problems with spark plugs:

  • Fuel fouled
  • Detonation
  • Worn out
  • Lead fouled
  • Carbon fouled
  • Sustained Preignition
  • Ash Deposit
  • Mechanical Damage

FAQ

How often to change spark plugs in Jeep 4.0?

every 30,000 miles

What are the best spark plugs for Jeep 4.0?

Champion Copper Plus 438 - Spark Plug for Jeep 4.0

Champion Copper Plus 438

What the best spark plugs for 98 Jeep Grand Cherokee 4.0?

E3-Spark-Plugs-E3.66 - Spark Plug for Jeep 4.0

E3 Spark Plugs E3.58

Which wpark plugs is OEM for Jeep 4.0 TJ?

NGK (3459) ZFR5N V-Power

Recommended spark plugs for Jeep 4.0?

Champion Copper Plus 438 - Spark Plug for Jeep 4.0

Champion Copper Plus 438

Indexing your spark plugs on a Jeep 4.0?

You just take a marker and mark the porcelain in line with the ground electrode. Then install the plugs with indexing spacers so the mark is at the top. (mark towards the valve cover)

Conclusion

Choosing spark plugs is undoubtedly much more convenient now than it was once before, but that does not mean that choice is always easy.Therefore, above all, in order to avoid making big mistakes and wasting money, we are required to try to understand each time which itemis more convenient for our purpose and ask ourselves questions about which one to choose.  Now you know the top Jeep 4.0 spark plugs andthe factors to consider before purchasing your product.

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