Ford LTD Spark Plug Replacement at your home or office.

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Spark Plug Replacement Service

How much does a Spark Plug Replacement cost?

On average, the cost for a Ford LTD Spark Plug Replacement is $112 with $17 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1985 Ford LTDV8-5.8LService typeSpark Plug ReplacementEstimate$220.11Shop/Dealer Price$256.39 - $342.73
1983 Ford LTDL4-2.3LService typeSpark Plug ReplacementEstimate$182.03Shop/Dealer Price$213.81 - $286.60
1979 Ford LTDV8-5.0LService typeSpark Plug ReplacementEstimate$243.95Shop/Dealer Price$291.21 - $410.44
1985 Ford LTDV8-5.0LService typeSpark Plug ReplacementEstimate$163.95Shop/Dealer Price$191.19 - $250.40
1970 Ford LTDV8-5.0LService typeSpark Plug ReplacementEstimate$243.95Shop/Dealer Price$291.22 - $410.47
1986 Ford LTDL4-2.3LService typeSpark Plug ReplacementEstimate$129.47Shop/Dealer Price$148.11 - $181.48
1986 Ford LTDV8-5.0LService typeSpark Plug ReplacementEstimate$168.95Shop/Dealer Price$196.07 - $255.20
1978 Ford LTDV8-5.0LService typeSpark Plug ReplacementEstimate$248.95Shop/Dealer Price$296.44 - $415.86
Show example Ford LTD Spark Plug Replacement prices

What are spark plugs and how do they work?

Spark plugs are one of the key components of your vehicle’s ignition system. They ignite gasoline and air inside of your engine. This gives your engine the power to propel you down the road. The spark plug takes high voltage electricity from the ignition coil and creates a spark at just right moment during the engine’s combustion cycle. This gives the engine the best mix of power, fuel economy and low emissions. However, the electrode at the end of the spark plug eventually wears out and can cause performance issues.

Spark plugs-MATROX-1

When should you replace spark plugs?

Replacement should follow the vehicle maintenance schedule. This will be listed in the vehicle’s owner’s manual. Some cars require regular replacement at 30k, 60k or 100k miles. It is possible in some cases that a spark plug might fail before the service schedule, but it’s not typically common.

Avoiding spark plug replacement can cause:

  • Difficulty starting your car.
  • Check engine light for a misfire code.
  • Flashing check engine light during acceleration for misfire, this can cause engine damage.
  • Reduced fuel economy and/or power.
  • Rough idle and/or unexplained engine vibration.
  • Failed State emission testing.

Even if only one spark plug is found to be faulty, they should always be replaced in sets. Most engines will require 4,6, or 8 spark plugs.

How do mechanics replace spark plugs?

Spark plugs are threaded into the engine’s cylinder head(s). Most cars have one plug per cylinder, so a four-cylinder engine will have four plugs, a six-cylinder engine will have six plugs, and so forth. The mechanic will:

  • Have the correct spark plugs on hand for your vehicle
  • Pull any diagnostic trouble codes that may be related to worn spark plugs.
  • Remove the original spark plugs and look at removed spark plugs for any clues indicating engine mis-operation exists; such as oil burning, excessively rich mixture, pre-ignition damage etc. Inform owner of any found unusual conditions.
  • Install new plugs using a torque wrench.
  • Finally, a road test of the vehicle to confirm normal operation.

Is it safe to drive with worn spark plugs?

Yes, but spark plugs that are worn enough to cause engine-misfiring have the potential to cause engine damage and overheating of the catalytic converter. Regardless of the age of the plugs, or mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects. Generally, spark plug failure will not keep the engine from running, but in cases of extreme wear, you may experience a limitation in the speed at which you can drive the car. If the maintenance schedule says the plugs should be replaced, it is best to do so promptly.

When having spark plugs replaced keep in mind:

  • High-speed driving may accelerate spark plug wear. Consider earlier than required inspection and tune-up if you operate the car in severe conditions.
  • Plugs should always be promptly replaced per the manufacturer maintenance schedule even if they appear to be working perfectly.
  • If your vehicle is equipped with spark plug wires (as opposed to a coil-on-plug system), the wires should be replaced at the same time. This may increase the cost of your repair.
  • It is possible that when doing a spark plug replacement, your vehicle may also need additional parts like ignition coils, this will add to the repair cost.
  • Some engines require that the intake manifold be removed while replacing spark plugs. This may increase the parts and labor cost for the repair.
  • Leaking valve cover gaskets, which have let oil get in contact with the spark plugs, coils or wires, may be the cause of ignition system issues. Valve cover gaskets will need to be replaced in addition to the spark plugs, wires or coils. This will add to the repair cost.

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Meet some of our expert Ford mechanics

Real customer reviews from Ford owners like you.

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Rating Summary
560
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2
3
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560
16
2
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Toby

10 years of experience
100 reviews
Toby
10 years of experience
Ford LTD V8-5.0L - Ball Joint Front Replacement (Upper Left, Lower Left) - Bedford, Texas
Job well done in a timely fashion.

Godwin

24 years of experience
253 reviews
Godwin
24 years of experience
Ford LTD * - Pre-purchase Car Inspection - Buena Park, California
I found my dream car on the internet but it was located in California. I needed someone in the local area to check out the car for me before I made the purchase. Fortunately I found out about yourmechanic.com and Godwin was the mechanic assigned to handle my situation. I could not be more happy with the service he provided. Nothing like having peace of mind when making a large purchase sight unseen. Thanks Godwin for the professional service.

Kiri

20 years of experience
372 reviews
Kiri
20 years of experience
Ford LTD V8-5.0L - Car is slow to accelerate - Philadelphia, Pennsylvania
Knowledgable mechanic blended with a great attitude. Took time to explain and teach.

Mahendra

14 years of experience
13 reviews
Mahendra
14 years of experience
Ford E-350 Econoline V8-7.5L - Spark Plugs - Astoria, New York
Excellent mechanic! Well experienced. He's a Big help!

Excellent Rating

(592)

Rating Summary
560
16
2
3
11
560
16
2
3
11
Number of Ford Spark Plug Replacement services completed
6512+
services done by our mechanics
TOTAL NUMBER OF EXPERT Ford MECHANICS
1700+
experts on our platform

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