Mercury Grand Marquis Ignition Cable (Spark plug wires) Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(390)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(390)

Ignition Cable (Spark plug wires) Replacement Service

How much does a Ignition Cable (Spark plug wires) Replacement cost?

On average, the cost for a Mercury Grand Marquis Ignition Cable (Spark plug wires) Replacement is $137 with $42 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1998 Mercury Grand MarquisV8-4.6LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$318.99Shop/Dealer Price$379.99 - $540.49
1996 Mercury Grand MarquisV8-4.6LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$298.99Shop/Dealer Price$360.01 - $520.52
1978 Mercury Grand MarquisV8-5.8LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$275.39Shop/Dealer Price$330.51 - $473.32
1997 Mercury Grand MarquisV8-4.6LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$298.99Shop/Dealer Price$359.99 - $520.48
1984 Mercury Grand MarquisV8-5.0LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$210.05Shop/Dealer Price$248.85 - $342.67
1989 Mercury Grand MarquisV8-5.8LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$210.05Shop/Dealer Price$248.83 - $342.64
1982 Mercury Grand MarquisV8-4.2LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$291.99Shop/Dealer Price$349.87 - $501.28
1985 Mercury Grand MarquisV8-5.0LService typeIgnition Cable (Spark plug wires) ReplacementEstimate$211.59Shop/Dealer Price$249.74 - $341.14
Show example Mercury Grand Marquis Ignition Cable (Spark plug wires) Replacement prices

What is the Ignition Cable (Spark plug wires) all about?

The ignition cables, also known as “spark plug wires” are part of the ignition system. They transfer the spark from the distributor or ignition coil to spark plugs that ignite the air-fuel mixture, starting the engine.

Over time, the cables can get weak and break down. This will make it harder for the spark to reach the engine cylinders, resulting in engine misfires. The car may not start at all. If one of the spark plugs has gone bad, the car will still start and run, but it will run poorly.

Keep in mind:

  • Ignition cable failure is often caused by other failing pieces in the ignition system; a mechanic should check for any other malfunctioning parts, and replace any parts of the system that don’t work.
  • Every time the ignition cables are replaced, the spark plugs should be inspected.
  • Leaking oil or coolant can cause ignition wire failure. If this is the case, the cause of the leak should be repaired or replaced, or else the new ignition wires will quickly be damaged as well.

How it's done:

  • Scan the computer system in the car for codes.
  • Inspect ignition cables (look for white spots).
  • Ohm test on individual cables.
  • Remove and replace the cables if found faulty.
  • Inspect the spark plugs.
  • Clear the codes.

Our recommendation:

Ignition wires should be replaced at least every 60,000 miles, but whenever your car is serviced, it’s a good idea to have the entire ignition system inspected. Any time that you have spark plugs replaced, it’s a good idea to have the ignition wires replaced as well. If you notice that your engine is running poorly, you should schedule an inspection.

What common symptoms indicate you may need to replace the Ignition Cable (Spark plug wires)?

  • Check Engine light is on.
  • Engine misfires.
  • Poor gas mileage.
  • Engine may shake (light vibration).

How important is this service?

The fuel in your automobile is ignited by a spark. This starts with the ignition coil, which transforms low voltage power into extremely high voltage. This high voltage is transferred through the ignition cables, and to the spark plug, where a spark is created that ignites the engine’s fuel, and powers the engine.

When one or more ignition cables fail, this voltage will not be transferred from the ignition coil to the spark plugs, and the fuel will not be ignited. Depending on how many of your ignition cables malfunction, your car will either run poorly, or won’t run at all.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercury mechanics

Real customer reviews from Mercury owners like you.

Excellent Rating

(390)

Rating Summary
368
12
4
2
4
368
12
4
2
4

Jason

17 years of experience
429 reviews
Jason
17 years of experience
Mercury Grand Marquis V8-4.6L - Car does not shift from park to drive - Palo Alto, California
Jason was great! He went above and beyond the job he was there to do. He was also so informative. Very happy with his services. I also left a yelp review.

Martin

29 years of experience
166 reviews
Martin
29 years of experience
Mercury Grand Marquis V8-4.6L - Car is shaking or vibrating - Antioch, Tennessee
My experience with Martin was satisfied. Martin explained the problems with my car to my understanding. He was friendly and knowledgeable of his job. I would recommend his service to anyone.

Jeremy

20 years of experience
592 reviews
Jeremy
20 years of experience
Mercury Grand Marquis V8-4.6L - Starter - Boynton Beach, Florida
Stuck for hours on a SUNDAY...but you guys saved me. Thanks

Nathaniel

10 years of experience
326 reviews
Nathaniel
10 years of experience
Mercury Grand Marquis V8-4.6L - Car Battery Replacement - Norfolk, Virginia
Nathaniel was on time and I was impressed with his knowledge and professionalism. He tested the alternator to see if that was the main problem, and found that both it and the battery were not working well. When replacing the battery, he informed me that the tie-in was missing and that I would need to have it replaced before getting the car inspected. I appreciated being made aware of these problems.

Excellent Rating

(390)

Rating Summary
368
12
4
2
4
368
12
4
2
4
Number of Mercury Grand Marquis services completed
4290+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercury MECHANICS
600+
experts on our platform

Recent articles & questions

P2016 OBD-II Trouble Code: Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 1
P2016 P2016 code definition Intake Manifold Runner Position Sensor/Switch Circuit Low Bank 1 What the P2016 code means P2016 is an OBD-II generic code for the Engine Control Module (ECM) detecting a low voltage failure in the intake manifold runner...
Should You Buy a Dash Cam?
If If you’re someone who loves to watch viral videos on social media, you’re going to be familiar with dash cam videos. You know the ones - car crashes caught on camera through the windshield of a car, massive explosions...
The Guide to Colored Curb Laws in All States
Parking laws exist to prevent blocked access for emergency vehicles or handicap spots. Prevent tickets by knowing your state's colored curb zone laws.

Car alarm goes off all on its own, can’t start car

This is a common issue for this generation of Highlander. The contacts in the hood latch for the alarm system wear out or otherwise get damaged through use. If the alarm computer is not sensing proper voltage through the switch,...

Transmission only has 1st gear

Hello. P0732 (https://www.yourmechanic.com/article/p0732-obd-ii-trouble-code-p0732-gear-2-incorrect-ratio-by-valerie-johnston) is the trouble code for an abnormal gear 2 shift ratio. If the vehicle's transmission computer detects that there is an issue with the gear ratio and timing of second gear, it will set off this code...

Put donut on.but it won't spin

You have either put the spare tire space saver on backwards or you have one that is not compatible with your car. If turning it around does not fix it then you will need to have the tire repaired or...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com