Ford F-100 Spark Plug Replacement at your home or office.

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

Get an upfront price

Service Area

Average rating from customers who
received a Spark Plugs Replacement.
Learn More

$106.99 - $150.29

Price range for all vehicles


YourMechanic Benefits

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.

Average rating from customers who
received a Spark Plugs Replacement.
Learn More


Spark Plug Replacement Estimate for Ford F-100

Ford F-100 Spark Plug Replacement costs $120 on average.

CarServiceEstimateShop/Dealer Price
1969 Ford F-100L6-4.9LService typeSpark Plug ReplacementEstimate$138.99Shop/Dealer Price$164.27 - $213.61
1983 Ford F-100L6-4.9LService typeSpark Plug ReplacementEstimate$138.99Shop/Dealer Price$164.33 - $213.71
1977 Ford F-100L6-4.9LService typeSpark Plug ReplacementEstimate$143.99Shop/Dealer Price$168.61 - $217.45
1979 Ford F-100L6-4.9LService typeSpark Plug ReplacementEstimate$138.99Shop/Dealer Price$166.01 - $216.65
1981 Ford F-100V8-4.2LService typeSpark Plug ReplacementEstimate$199.71Shop/Dealer Price$239.01 - $333.01
1982 Ford F-100V8-4.2LService typeSpark Plug ReplacementEstimate$204.71Shop/Dealer Price$243.79 - $337.64
1976 Ford F-100V8-5.0LService typeSpark Plug ReplacementEstimate$156.79Shop/Dealer Price$186.98 - $252.83
1966 Ford F-100L6-4.9LService typeSpark Plug ReplacementEstimate$133.99Shop/Dealer Price$161.10 - $211.81
Show example Ford F-100 Spark Plug Replacement prices

Spark Plug Replacement Service

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.

Fast and easy service at your home or office

GET A QUOTE FOR YOUR CAR

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Ford mechanics

Real customer reviews from Ford owners like you.

Excellent Rating


YourMechanic Ford F-100 Service

Average Rating

4.4/5

Number of Reviews

31

Rating Summary
25
0
3
0
3
25
0
3
0
3

Noe

34 years of experience
604 reviews
Noe
34 years of experience
Ford F-100 - Spark Plugs - Renton, Washington
NOE WAS GREAT ,WILL PROBLY USE NOE AGAIN

Noe

34 years of experience
604 reviews
Noe
34 years of experience
Ford F-100 - Battery Light is on - Renton, Washington
WELL IT WASNT THE ALTERNATOR SO NOE THOUGHT MAYBE THE VOLTAGE REGULATOR I TOLD NOE I COULD DO THIS NEW REGULATOR STILL NOT PUTTING OUT ENOUGH ONLY 12.8 WITH LIGHTS ON ,SO WHATS NEXT ?IF MY PROPLEM CAN GET SOLVED LIKE LAST TIME I WOULD VEARY LIKELY RECOMEND MY MECHANIC AND NOE AS FOR QUESTION 3 WE SHALL SEE MY PROBLEM IS NOT RESOLVED SO I CANT ANSWER THIS QUESTION YET

Brikk

16 years of experience
373 reviews
Brikk
16 years of experience
Ford F-100 - Car is not starting - Charlotte, North Carolina
He was very knowledgeable and helpful!

Chris

20 years of experience
1628 reviews
Chris
20 years of experience
Ford F-100 - Pre-purchase Car Inspection - Mission Viejo, California
Chris was early, friendly, and very knowledgeable. He answered all my questions and was very thorough reviewing the vehicle. I'm looking forward to having him back for future services.

Excellent Rating


YourMechanic Ford F-100 Service

Average Rating

4.4/5

Number of Reviews

31

Rating Summary
25
0
3
0
3
25
0
3
0
3
Red-stars EXCELLENT RATING ON
Number of Ford F-100 services completed
341+
services done by our mechanics
TOTAL NUMBER OF EXPERT Ford MECHANICS
1300+
experts on our platform

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.

1-800-701-6230 · hi@yourmechanic.com