2010 dodge journey spark plug replacement

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Spark plug replacement

By km-04 January 9, 2018 in Engine & Transmission

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Went to the dealership for an oil change. The service person said the DJ schedule stated the spark plugs  need to be replaced at the current mileage. I asked how much and he said $185. I politely differed to later and said thank you. $185 to change spark plugs ? Are the recommended spark plugs  made of gold or something? Am I the only one who thinks that sounds high? Geesh, just had to get that out of my system.

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Which engine ?

on the 6 they should be replaced around 100k (on the 09 at least) but to do it you have to take the intake manifold off, thus the high charge.  I was lucky, my DJ was in the shop getting a new intake manifold so my service manager changed the plugs at the same time (82k miles).  A little early, but all I paid for was $60 for plugs.  No labor.

Dang Fred, I did forget to mention that little detail, thanks for reminding me. I have the 3.6 L V6. Yep, coming up on 100k soon. No such luck here, it would be just for the plugs and labor.

I miss the days of popping the hood and grabbing a wrench/ratchet and gettin to business.....

It's not that hard to remove the intake. 

well i watched a you tube on doing it and even as cheap as i am i think i will defer to the dealership or a local trusted mech as seams like like a lot of wiring has to be undone and since i have the lifetime warranty think ill just let them do it so it will be on record and as the older i get i second guess myself on things, maybe if i had watched someone do it in person i might try it. oh well better to be then sorry.......actually have been watching the dealerships for a service  coupon on the tuneup havent sen anything in a long time its like they dont run service  discounts anymore?

• OhareFred and jkeaton

30 minutes ago, 2late4u said: well i watched a you tube on doing it and even as cheap as i am i think i will defer to the dealership or a local trusted mech as seams like like a lot of wiring has to be undone and since i have the lifetime warranty think ill just let them do it so it will be on record and as the older i get i second guess myself on things, maybe if i had watched someone do it in person i might try it. oh well better to be then sorry.......actually have been watching the dealerships for a service  coupon on the tuneup havent sen anything in a long time its like they dont run service  discounts anymore?

Really? I just watched a video also and there was no wiring to undo, just unplug the clip from the coil pack. Granted this is the 2.4 L engine  and I have the 3.6. Is it that much difference between the two?

Yes. The 3.6 is a completely different engine  with the plugs in a different location than the 2.4. The back 3 plugs are under the intake . 

There is a world of difference between the 3.6 and 2.4.  The 2.4 is "Remove engine beauty cover, unbolt coil packs, remove coil packs, remove spark plugs , installation is reverse. The end."

3.6 requires removal of the intake manifold and temporary re-routing of several cables in the process.  It is physically impossible to get to them without removing the intake.  The plugs are RER8ZWYCB4 (iridium plugs, they sell for about $7/each, you need 6).  $180 for that engine , with parts, labor, and a 10% shop fee is not unreasonable.  It's about an hour long job for a well trained mechanic ($120/hour in labor, $40 in parts, +10% shop fees = $176, local tax laws could easily account for the other $10).

Thanks for the info guys, jkeaton and bfurth. I am glad you all gave me the lowdown on the differences. Maybe I won't try doing this myself. I am, by nature, a cheap bastard. If I can do it myself and save money I'm all for it, which I thought was the case here. Obviously I was way wrong on that. I just remember when everything was pretty much right there when you opened the hood  and had easy access and didn't need special tools to do it.

2late4u, we apparently watched 2 different videos, sorry man. I just wasn't seeing what you were seeing, hence my confusion.

Try this video.  Also, ignore the model years - they're wrong on the early end, and don't matter since the 3.6L is the same for all Journeys that have one.  You don't "need" any special tools (you should use a torque wrench , and most DIY parts stores should be happy to rent you one).  You can definitely save $140 by doing it on your own, IF you want to spend the potentially 2+ hours figuring it out.  It's always a question of what your time is worth to you.  And whether or not you trust the information gleaned from this video.

I'd also recommend checking your local library system to see if they subscribe to any kind of online service manuals.  There's a decent chance they do, in which case you have much more detailed information available to you than you realize.

4 hours ago, bfurth said: Try this video.  Also, ignore the model years - they're wrong on the early end, and don't matter since the 3.6L is the same for all Journeys that have one.  You don't "need" any special tools (you should use a torque wrench , and most DIY parts stores should be happy to rent you one).  You can definitely save $140 by doing it on your own, IF you want to spend the potentially 2+ hours figuring it out.  It's always a question of what your time is worth to you.  And whether or not you trust the information gleaned from this video.   I'd also recommend checking your local library system to see if they subscribe to any kind of online service manuals.  There's a decent chance they do, in which case you have much more detailed information available to you than you realize.  

lol,,, after watching this shit ,,now i know ill take it to the dealer worst video i have ever seen

Steven Harshbarger

Well, that looks pretty rough in high speed motion, but I'd bet it's not as challenging as you'd think.  Just gotta take your time and make sure you don't have any left over bolts.

• 2late4u and jkeaton

Yeah, as I said, it's really not that difficult. Just time consuming. But, you do you. 

km, it takes a lot of patience and time to change those plugs. After helping someone do the job, I am saving up to take mine to the dealer/mechanic when needed. My dealer quoted $250 to my friend, but after actually doing it I believe it might be worth it. I think I am on that same, 'As I get older, as cheap as I may be, I prefer to let someone else do the work'. If there is an issue, you can just bring it back.

With that said, I do miss the days of just pulling the wires out and unscrewing the plugs...it seemed to work just fine DAMNIT!!!

• 2 years later...

getting changed this morning , some jobs are just not worth fighting with as a DIY......$300 CDN out the door including top of the line plugs. Will update

• larryl , OhareFred and jkeaton

weather you have the 2.4 or the 3.6 you will also have to buy a spark plug socket that is magnetic as well as the hole the plugs go into are about 3-6 inches deep, i change my daughters 2.4 plugs for her and bought a plug socket but it wasn't magnetic just had the rubber plug that is suppose to hold it in and it still keeps falling oust of the socket so i grabbed a 6 inch piece of air line tube off my wife's oxygen concentrate ( one of the old tubed that is) and stuck it onto a small Phillips screwdriver and the other end fits over the connector on the plug and that way i can install the plug hand tight before using the ratchet to tighten it....

DodgeaWrench

$185 seams like a pretty good price from a dealership for OEM replacements.

I'm a cheap-o too.

Yes, I was very nervous at the thought of removing the intake, but after the fact, it's not really that big of a deal.  Just takes a bit time and patience.  It took me an entire, but leisurely, Saturday morning to replace the plugs.  

I'm very glad I went through the process to learn how to change my plugs myself, as it turned out when doing the plugs, I found one of the spark plug tubes was filled with oil due to a gasket leak.  If I would have had the car at a dealership, that would have tacked on another $200-$300 (or more) to the bill.  I was able to cleanup the oil, change the plugs, put it all back together, then research how to fix the spark plug tube gasket.  On another occasion I then went back in, this time even further in, and pulled the valve cover to replace the tube gasket and valve cover gasket.  All of this is well outside my comfort zone, but again, after the fact, it wasn't difficult, nor require specialized skills or tools.  YouTube and this forum are my friend.

• Armando G and 2late4u

lol you tube is the greatest teacher there is,if only we would have had it back 30-40 yrs ago,, if you get a chance watch fix it angel he is really great but he mostly works on imports, but this guy does more with just one hand than most of us do with two hands i watch it all the time

• 7 months later...

Well, here we are 3 years after I went through this post and I'm now considering changing my spark plugs. I am not at the 100k mark, but with 74k on the clock and 6 years +/- on the car, I am considering getting them changed now. 

I'm more curious on everyone's thoughts on this?  Am I being overly cautious or would it be a good idea? No issues with the car, still running like a champ, I just feel a little (Little) less umph going up those mountains. I've maintained everything else and the plugs would almost be the only original maintenance part on the car (well, and the brakes - still have over 40% left on them). Getting ready for another big trip, which is why this pipe into my head. 

Thoughts???

well 6 yrs of heat and miles might take their toll on the plugs wouldn't hurt to do it then you will be set for another 6 yrs you might as well do the coolant change as well as the the transmission service as well, thats what i did at around 95 k last yr i let the dealership do it since i have the max warranty , but its on record if i should have any problems down the line, and yep kind of pricey at the dealership but oh well you cant take it with you........P.S. actually had the trans done at 60 k and then redone again at the 95 K   first time it was around 150 the second time was higher i think it was around 215

John/Horace

A little early for the plugs, you will get codes if they are malfunctioning. At a 100k miles I only had 10 thou of wear on electrodes.

Was-doing oil cooler replacement so plugs changed too.   Fluids more important, pricier repair if a break down. Upstream O2 does fuel trim rich/lean,  it’s even early for that, but gas is expensive and that might improve fuel economy slightly, plugs wouldn’t.  My 2 cents.  

On 7/6/2021 at 5:59 PM, 2late4u said: change as well as the the transmission service as we

Well, I am one of the lucky ones that had their transmission go out on them while still under warranty in 2019. New tranny installed and coolant flushed at that time. I believe i was in the 40k range at that time, so I am good there. Plugs are on my mind probably because I'm old school. Like I said, car is running great just not used to not doing plugs regularly. 

I appreciate the advise. 

• 1 year later...

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On 2021-07-09 at 12:36 AM, Armando G said:   Well, I am one of the lucky ones that had their transmission go out on them while still under warranty in 2019. New tranny installed and coolant flushed at that time. I believe i was in the 40k range at that time, so I am good there. Plugs are on my mind probably because I'm old school. Like I said, car is running great just not used to not doing plugs regularly.    I appreciate the advise. 

The coolant Chrysler uses in all their products has a 10 year, 240,000 km lifespan. Unless the coolant was contaminated with transmission fluid-I would call that impossible-that flush was a waste of time. But you received the work under warranty so no worries for you but this is how dealers pad their profits and how technicians make more money because they are forced to work in a flat rate system of renumeration.

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2010 Dodge Journey

2010 Dodge Journey - Spark Plugs

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Spark plugs receive power from the distributor and/or ignition coil(s) that they use to create the spark needed for combustion, and are crucial to starting and your vehicle's engine. The spark plugs on your car consist of a center electrode that receives power, and a ground electrode that completes the circuit to arc, making a spark. Without healthy spark plugs, your car will not start or move or may experience a loss in performance or efficiency. Although they're designed for lasting performance - around 80 to 100 thousand miles - spark plugs wear out over time as the electrode material degrades. If the spark plug electrode wears down too far, the gap may become too wide for electricity to arc, resulting in a weak spark or a complete lack of spark, and an engine that will not start. Additionally, pre-combustion can cause the spark plug electrodes to fail prematurely. Spark plugs may also be fouled by overly-rich fuel mixtures or oil contamination, which can cause engine misfires and allow the spark plug to only operate intermittently. A non-working spark plug can also be caused by a failing ignition coil, spark plug wire or boot, or a damaged connection from constant heat and long-term use. This damage can affect your vehicle's ability to ignite the fuel mixture and prevent you from starting your vehicle or running the engine. Signs of a bad spark plug include misfiring if your vehicle has difficulty starting, a rough or loud idle, reduced fuel economy, trouble starting your car or accelerating, an illuminated Check Engine light , and more. Replacing spark plugs is part of a regular tune-up, so if your spark plugs need to be replaced, you should also consider replacing the spark plug wires or coil boots to restore optimal performance. If you're unsure of what spark plugs your car needs, check out our helpful articles on how to choose the right spark plugs , how to set spark plug gap , and much more. Shop O'Reilly Auto Parts for the best spark plugs, spark plug wires, coil boots, and other spark plug and ignition system parts for a complete tune-up or repair.

Home » Troubleshooting » Dodge Journey bad spark plugs symptoms, causes, and diagnosis

Dodge Journey bad spark plugs symptoms, causes, and diagnosis

The spark plugs in Dodge Journey are responsible for generating sparks that ignites the air/fuel mixture in the combustion chambers of the engine. Driving your Journey with bad spark plugs can damage the engine or the catalytic converter, so you must act urgently to avoid more expensive repairs.

The most common signs of bad spark plugs in Dodge Journey are poor acceleration or hesitation, rough idle, engine misfires, poor fuel economy, check engine light illuminates, engine knocking noise, and sometimes hard starting. In worst case scenario, if the spark plugs are in really bad condition, the engine will not start.

Check engine light illuminates due to misfires

When one or more of the spark plugs start to fail or has failed in your Journey, it will cause the engine to misfire and the check engine light may illuminate in the instrument cluster. To perform further diagnostics, you will need to connect OBD2 scanner to your vehicle. If you see any error code from P0300 to P0312, it indicates that there are misfires in the engine. However, it can happen that there are no error codes. In case of doubt, check the condition of the spark plugs and replace them if found defective.

Poor acceleration

If the spark plugs are not generating sparks properly, the engine will lose power. When you press the gas pedal in your Journey, the vehicle may hesitate to accelerate and it will take longer to reach your desired speed.

Another indication of bad spark plugs in Dodge Journey is rough idle. The engine will not run smooth when idling, you may also feel vibrations in the cabin.

Poor fuel mileage

Excessive fuel consumption is a common sign of bad spark plugs in Journey. If your vehicle is getting significantly lower gas mileage than usual, its time to inspect the condition of the spark plugs.

Hard starting

When the spark plugs go bad, it is going to take longer for the engine to turn over and start. The ignition system in your Journey will have to work a lot harder to be able to ignite the air/fuel mixture in the combustion chambers.

Your Journey may not start if the spark plugs have worn too much, or if they have been contaminated due to improper combustion. For example, a malfunctioning MAF sensor or O2 sensor can cause the engine to misfire or run rich that can cause carbon fouling of the spark plugs.

What causes spark plugs to go bad in Dodge Journey?

A spark plug is like a canary in a coal mine for the engine. Inspecting the condition of the spark plugs in your Journey can help you determine the health of the engine.

Normal wear

Replacing spark plugs is part of regular maintenance since its a wearing part. If you do not replace the spark plugs in your Journey at the prescribed interval, they will wear out and stop producing sparks properly. Read the owners manual or maintenance schedule of your vehicle to know when to change them.

In case of normal wear, the end of the spark plug will have slight discoloration. Also, the center electrode and/or ground electrode tip may have worn away, increasing the gap between them.

Rich air-fuel mixture / carbon fouling

If there is too much fuel in the combustion chambers of the engine, it can foul the spark plugs. When this happens, the end of the spark plug will have dry layer of gray or matte black (sooty looking) carbon deposits evenly distributed over the electrode and the porcelain. Before installing new spark plugs in your Journey, you must fix the problem that is causing the engine to run rich, otherwise your new spark plugs will get fouled again.

Common causes of engine running rich in Dodge Journey are defective or dirty MAF sensor, bad upstream O2 sensor, malfunctioning fuel pressure regulator, leaky injector and faulty engine coolant temperature sensor.

Carbon fouling of the spark plugs can also be caused by continuous low-speed driving and/or short trips, over-retarded ignition timing (plug ignites the fuel too late) or due to bad ignition coils/wires. Using spark plugs with too cold heat range can also cause carbon fouling, in this case the firing end does not reach the self-cleaning temperature of approximately 450°C (842°F).

Engine oil leak

An oil leak in the combustion chambers of the engine can cause the spark plugs to foul up in Journey. When this happens, the end of the spark plug will have wet oily or greasy looking gunk over the electrodes, and it will also smell of oil. Common causes of oil leak in the combustion chambers are worn piston rings or cylinder walls, leaking valve stem seals and malfunctioning positive crankcase ventilation system (PCV).

An oil leak in the spark plug well can also cause the spark plug to stop working properly due to contamination of ignition coil. This usually happens due to a leak in the spark plug tube seal in the valve cover.

Coolant leak

Coolant leaking into the combustion chambers of the engine can also foul the spark plugs in Journey, which is commonly caused by a leaking head gasket or leaking intake manifold gasket.

When coolant burns in the combustion chamber, it can leave a gray or white ashy looking layer of silicates over the end of the spark plug. The appearance can differ depending on the type of coolant you’re using in your vehicle. Monitor the level of the coolant in your Journey if you suspect a coolant leak.

Fuel additives

Using fuel additives like octane boosters or fuel injector cleaners in your Dodge Journey can foul the spark plugs. In this case, there will be orange or reddish brown colored deposits distributed over the firing end of the spark plugs.

This condition can cause the engine to misfire. Normally fuel additives are non-conductive; however some are, and they can create an earth leakage path for the spark if excessive deposits build up at the firing end of the spark plug.

Overheating

Repeated overheating of the spark plug tip can cause premature failure. When a spark plug overheats, the surface on the firing end becomes white and cinder-like deposits form spots on its surface. Electrode melting is a more severe condition of overheating when spark plug temperatures reach 800 degrees Celsius (1,472°F) or more. The firing end of the plug may glow red hot from excessive heat and induce abnormal combustion prior to sparking (pre-ignition), which can damage the engine.

Causes of overheating include over advanced ignition timing, excessively lean air-fuel mixture, insufficient coolant or engine oil, excessive turbo pressures (in turbo equipped vehicles), fuel octane rating too low (causing engine knocking), inadequate fuel quality and insufficient plug tightening.

How to replace spark plugs in Journey

If the spark plugs go bad in your Dodge Journey, you must replace them with new ones. You don’t necessarily have to visit a workshop to replace the spark plugs, you can do it at home by following a few simple steps. Before you begin, make sure the engine is cold to prevent burn injury.

• Disconnect the electrical connectors from the ignition coils.
• Remove the ignition coils.
• Remove any dirt or debris inside the spark plug tubes using compressed air.
• Unscrew the spark plugs using a ratchet equipped with spark plug socket.

• Screw in the new spark plugs by hand and tighten it up with a torque wrench.
• Reinstall the ignition coils and their electrical connectors.

Recommended video

Which type of spark plugs to use in Journey?

There are four main types of spark plugs: copper, platinum, double platinum and iridium. Generally all the spark plugs have similar type of internal components, but where they differ is at the tip where the spark happens. Check the owners manual of your Dodge Journey to see which type of spark plug is recommended for your engine, as it can differ depending on the engine type and model year of the vehicle.

You can generally upgrade to higher quality spark plugs. For example, if your owners manual recommend platinum, you can upgrade to iridium spark plugs. But never downgrade to lower quality plugs.

Copper: This is the most basic and least expensive spark plug. The tip is made of copper, which is highly conductive, therefore creating a strong spark. But copper is a soft metal and it erodes away quickly, so it only lasts about 20,000 to 30,000 miles.

Platinum: They are a little more expensive than the copper plugs. In this case, as the name suggests, the tip is made of platinum, which is not as conductive as copper but is harder and more resistant to wear. Platinum plugs can last from 60,000 to 100,000 miles.

Double Platinum: In this type of spark plug, the center electrode tip is made of platinum and there is also another piece of platinum on the ground electrode. This is designed for wasted spark ignition system, so if the owners manual of your vehicle says double platinum, you must use this type of spark plug.

Iridium: This is the most expensive type of spark plug. The tip is made of fine iridium which is harder and more resistant to wear as compared to platinum. Iridium has a melting point of up to 4,471°F (2,466°C), which is almost three times the melting point of copper. Iridium plugs can last 100,000 to 120,000 miles.

Use OBD2 scanner for diagnosis

Since Dodge Journey is equipped with on-board diagnostics (OBD), a fault diagnosis can provide initial indications of where the malfunction is located.

To begin troubleshooting, you must first connect the diagnostic tool to your Journey. The OBDII connector is usually located under the dashboard. With the tool connected, turn on the ignition. Most diagnostic devices then ask for some information about the vehicle. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. In addition to the vehicle make, model, and engine type, you usually also have to type in the Vehicle Identification Number (VIN). Since some OBD codes are manufacturer-specific, the scanner will be able to give you more accurate information if you enter more details about your Journey.

If you see noticeable loss of performance or engine hesitation with high fuel consumption in your Dodge Journey, you should definitely check the condition of the spark plugs and ignition coils. Nevertheless, it is recommended to strictly follow the maintenance schedule of your vehicle and replace the spark plugs at prescribed intervals for optimal engine performance and fuel efficiency. Do not wait for the spark plugs to go bad before replacing them as it can damage the engine or the catalytic converter.

In any case, it is advisable for laypersons to visit a workshop. A professional mechanic can swiftly diagnose the problem for you.

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Dodge Journey Spark Plugs Replacement Costs

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How to Replace a Bad Spark Plug

Replacing spark plugs can involve remov ing multiple components, like the intake manifold and spark plug wire — which can be difficult i n some vehicles.

Moreover, a bad spark plug replacement job can lead to engine damage, requiring expensive auto repair . That’s why it’s best to get a professional spark plug service .

Still, if you wish to take the DIY route, here’s a guide on how mechanics perform spark plug replacement : 

Firstly, a mechanic will need:

• New spark plugs
• Spark plug socket
• Ratchet and torque wrench
• Spark plug gauge ( gap gauge )
• Anti-seize lube
• Dielectric grease, etc.

Note: Ideally, replace all the spark plugs together — even if all haven’t failed.

Here’s the process they’ll follow:

1. Ensure the engine is cool. Then disconnect the battery .

2. Remove the engine cover.

3. Disconnect the ignition coil connector or the spark plug wire of the spark plug they’ll replace first. They’ll ensure not to tear off the wire terminal from the plug wire end. If the wire is damaged, they’ll replace it.

4. Unscrew the old spark plug using a spark plug socket .

5. Clean the spark plug hole to remove debris . This debris can damage the cylinder head threads.

6. “Gap” the new spark plug using a spark plug gauge if it isn’t “pre-gapped”. They’ll check your owner’s manual for the engine’s plug-gap specifications.

7. Apply a thin layer of dielectric grease to the spark plug boot.

8. Install the new spark plug .

9. Tighten the new plug with a torque wrench according to the manufacturer’s specifications.

10. Reinstall the ignition coil or spark plug wire connector.

11. They’ll repeat the process for the other plugs.

12. Reinstall the engine cover and s tart the engine to ensure everything works after installing the new plug set.

How Much Does Spark Plug Replacement Cost?

Getting spark plugs replaced with new inventory can cost between $100 and $500 (including car parts and labor costs) . The cost of installing new plugs can depend on your location, vehicle model, and type of spark plug .

Here are individual estimates for new plugs (based on type):

• Copper spark plugs : $2 to $10 per piece
• Platinum spark plugs : $10 per piece
• Double platinum spark plugs : $20 per piece  
• Iridium spark plugs : $20 to $100 per piece
• Spark plug wires : $140 to $175

Note: You may also need to replace spark plug wires if you drive an older vehicle with a distributor ignition system .

How Often Will I Need to Replace Spark Plugs?

Most manufacturers recommend getting spark plug service or new inventory every 30,000 miles. However, your spark plug ’s lifespan can range between 10,000 miles and 150,000 miles depending on the:

• Spark plug metal type
• Spark plug design
• Vehicle’s make and model

Consult your owner’s manual to know when to change spark plugs and the correct type for your vehicle. It’s also good to check the ignition coil and spark plug wires when replacing your old spark plugs .  

What if they go bad? Get faulty spark plugs replaced immediately since they can cause poor acceleration and engine misfires . The latter could damage the catalytic converter , decrease fuel economy , and cause irreversible engine damage .

Your car battery may also die from repeatedly trying to crank your car.

That’s why you should get your spark plugs checked while doing car maintenance and tune-up activities for other car parts , like brake pads or oil change service .

What Are the Common Symptoms of Failing Spark Plugs?

Faulty spark plugs can lead to automotive symptoms like:

1. Check Engine Light Comes On

A worn spark plug can cause your Check Engine Light to activate or keep flashing .

Why? Fouled spark plugs won’t ignite the air- fuel mixture correctly, triggering engine misfires and activating the Check Engine Light .

Besides a faulty spark plug , the Check Engine light can also appear due to spark plug wire or coil pack issues.

2. Fuel Efficiency Drops

Bad spark plugs increase your vehicle’s fuel consumption due to incomplete combustion.

In fact, spark plug failure can reduce your car’s fuel efficiency (a.k.a. fuel economy ) by around 30%.

Unburned fuel from incomplete combustion that’s expelled from the combustion chamber may also damage the catalytic converter .

3. Engine Idles Rough

I f your vehicle has a faulty spark plug , you may face rough idling and hear pinging, rattling, or knocking sounds due to misfires .

4. Car Struggles to Start

Worn spark plugs will struggle to fire your engine , likely stalling it. However, the starting troubles could also be due to a car battery problem.

5. Engine Performance Reduces

An old spark plug can cause incomplete combustion, reduc ing engine performance and causing poor acceleration .

6. Exhaust Emissions Smell like Gasoline

Unburned fuel reaches the vehicle’s exhaust system when a spark plug issue doesn’t ignite the air- fuel mixture properly in the combustion chamber . This makes emissions smell like gasoline.

2 Spark Plug Replacement FAQs

Here are answers to questions that may arise when facing a spark plug issue :

1. Why Do Old Spark Plugs Need Replacing?

Every time a spark forms between the spark plug ’s center and ground electrodes, it burns off metal from each electrode , creating a gap. This spark plug gap increases as your plugs fire during engine operation.

Over time, the spark plug gap grows so much that the required spark no longer forms, and the spark plug fails.

2. Do I Need to Replace All the Spark Plugs ?

Ideally, you should change all the spark plugs together .

If you only replace bad spark plugs , each spark plug in your engine will have a different replacement cycle. Consequently, you’ll need to spend more effort on car care and auto repair whenever each spark plug fails.

Moreover, your car engine works best when all the spark plugs have similar performance levels. For instance, if two spark plugs in a four-cylinder engine perform differently than the rest, it can lead to the engine running out of sync.

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Collection: Dodge Ram Wiring Harness

Looking for a Dodge wiring harness? All Dodge Parts offers a wide range of wiring harnesses for Ram trucks from various years. Our inventory updates daily with both new and used options. 

A Dodge Ram wiring harness is essential for the truck's electrical system, connecting and powering everything from headlights to the audio system. It ensures safe and efficient power distribution across the vehicle's various electrical components.

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Engine Control Module #R4886929 for 1996 Dodge Ram 2500

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