How Often Should the Spark Plugs on a Jeep Cherokee Be Replaced?

1 Answers
McJason
07/29/25 9:08pm
How Often Should the Spark Plugs on a Jeep Cherokee Be Replaced? The spark plugs should be replaced every 40,000 kilometers. Methods to Determine if a Spark Plug is Damaged: Remove the spark plug and observe its condition based on the following appearance colors. A normal spark plug's insulator skirt and electrodes appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a reddish-brown insulator skirt, an electrode gap between 0.8-0.9mm, and no signs of electrode burning. If the spark plug is covered in oil or deposits but is not damaged, it can continue to be used after cleaning off the oil and deposits. If the spark plug is severely damaged, with signs such as blistering at the top, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plug with a new one. Additionally, if the spark plug appears black as if smoked, it indicates that the wrong heat range was selected or that the air-fuel mixture is too rich, with oil creeping up.
Was this review help?
13
2
Share
More Forum Discussions

Where to Install ETC for a New Car?

ETC can be processed at bank branches, highway service areas, and other institutions. The application requires the original and photocopies of the vehicle owner's valid ID card and driving license. If the application is not made by the owner, the agent's valid ID card must also be provided. The photocopy of the driving license must include the page with the most recent annual inspection stamp. A Postal Savings credit card application form is required, as this credit card will be used to bind the ETC card. After obtaining the credit card, swipe it twice and present the POS receipt to receive and install the ETC onboard device for free at designated Postal Savings outlets. No fees are charged during this process. Applicants must be between 18 and 60 years old and own the vehicle in their name. ETC stands for Electronic Toll Collection. The application requires the original and photocopies of the vehicle owner's valid ID card and driving license. If the application is not made by the owner, the agent's valid ID card must also be provided. The photocopy of the driving license must include the page with the most recent annual inspection stamp. A bank card for deducting highway toll fees is required. Applicants must be between 18 and 60 years old and own the vehicle in their name. Here are some considerations for installing ETC: Do not obstruct the view; it is best to install it behind the rearview mirror: Many car models have a steeply inclined windshield, which can reduce the driver's field of vision. If this is not considered during ETC installation, it may increase the driver's blind spots. Install it behind the right side of the rearview mirror to avoid obstructing the view. Do not interfere with charging: The ETC electronic tag consumes power but generally does not require charging or battery replacement because it has a solar panel on the back for self-charging. Therefore, avoid installing it on the blackened areas of the windshield or positions that might block the solar panel. Once installed, do not remove it arbitrarily: The button in the middle of the adhesive is an anti-removal lever connected to a switch. After installation, the windshield will press the anti-removal lever in. If the tag is removed arbitrarily, the lever will pop out and trigger the switch, locking the electronic tag and rendering it unusable. You will then need to visit an ETC service point to unlock it. This mechanism is designed to prevent multiple vehicles from sharing one device. When using ETC, note the following: The ETC transaction sensing range is 8 meters. To avoid paying for the vehicle in front due to its ETC device malfunction, maintain a distance of more than 10 meters from the vehicle ahead. The ETC lane recognizes vehicles at speeds up to 20 km/h; driving too fast may result in failed fee deductions due to unreadable device information. If a debit card is used to bind the ETC, insufficient balance may also cause fee deduction failures.
6
0
Share

What to Do When Car Wheels Freeze After Washing in Winter?

The solutions for frozen car wheels after washing in winter are: 1. Use tools to remove ice chips attached to the tire surface; 2. Pour warm water mixed with salt onto the frozen parts of the tire; 3. Use a hairdryer to blow hot air onto the frozen areas of the wheel. The functions of tires are: 1. Transmit driving force, braking force, and steering force to achieve vehicle operation; 2. Support vehicle load; 3. Reduce and absorb vibrations and impacts during driving. Tire maintenance methods include: 1. Regularly clean stones stuck in tire treads; 2. Minimize tire exposure to direct sunlight; 3. Check tire pressure promptly; 4. Pay attention to suspension maintenance; 5. Regularly inspect front wheel alignment; 6. Adopt careful driving habits, choose road surfaces wisely while driving, avoid objects that can puncture or scratch tires, and steer clear of chemical spills that may corrode tires.
19
0
Share

What does 'Please add cleaning fluid' mean?

Please add cleaning fluid means that the windshield washer fluid has been used up and needs to be refilled. Automotive windshield washer fluid is a consumable item in vehicle use. Some car models can detect the remaining level of the windshield washer fluid, and when it runs out, the system will alert the owner to add more in time to avoid affecting normal use. The functions of windshield washer fluid are: 1. Keeping the front windshield transparent while driving; 2. Extending the lifespan of the glass and wipers; 3. Preventing the windshield from icing up in winter; 4. Preventing static electricity on the windshield. The method for adding windshield washer fluid is: 1. Open the hood and locate the windshield washer fluid filler port; 2. Open the cap and pour the washer fluid into the container; 3. Observe the fluid level until it reaches the marked line.
7
3
Share

What is the reason for the car shaking when accelerating at 40 km/h in third gear?

The reasons for the car shaking when accelerating at 40 km/h in third gear are: 1. The front wheels of the vehicle have misaligned positioning angles, resulting in excessive toe-in and causing the vehicle to shake; 2. The tire pressure of the front tires is below the normal value, or the tires were not balanced after repair; 3. The wheel spokes of the front tires are deformed; 4. There are loose parts inside the transmission system; 5. The drive shaft is bent, causing dynamic imbalance and leading to vehicle shaking. Precautions for shifting gears include: 1. Do not look down while shifting gears to ensure driving safety; 2. Keep the steering wheel steady while shifting—hold the wheel firmly with one hand and shift gears with the other; 3. Avoid violently shaking the gear lever back and forth; 4. Ensure the gear and speed are properly matched.
15
0
Share

How to Start a Mercedes-Benz When the Battery is Dead?

Mercedes-Benz vehicle with a dead battery can be started by: 1. Push-starting; 2. Jump-starting with another vehicle. Taking the 2021 Mercedes-Benz A180 as an example, it belongs to the compact car category with body dimensions of: length 4419mm, width 1796mm, height 1432mm, and a wheelbase of 2729mm. The 2021 Mercedes-Benz A180 features a front MacPherson strut independent suspension and a rear torsion beam non-independent suspension. It is equipped with a 1.3L turbocharged engine delivering a maximum horsepower of 136PS, maximum power of 100kW, and maximum torque of 200Nm, paired with a 7-speed dual-clutch transmission.
10
4
Share

What Causes Idle Vibration After the Car Warms Up?

Reasons for idle vibration after the car warms up: 1. The idle speed motor is damaged and cannot adjust the opening of the air valve; 2. The fuel injector is clogged or the fuel pump is faulty, the fuel line is obstructed; throttle body failure, air leakage prevents proper control of the air intake; 3. The intake sensor is faulty, leading to uncontrolled air intake; 4. Engine control logic error, unable to stabilize idle speed. Solutions for idle vibration after the car warms up are: 1. Clean the fuel system, check the idle speed motor for carbon buildup and clean if necessary; 2. Inspect the spark plugs for excessive carbon deposits and replace them if needed; 3. Check the fuel pressure and replace components as necessary.
2
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.