Ford F-350 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 F-350 Spark Plug Replacement is $169 with $29 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1996 Ford F-350V8-7.5LService typeSpark Plug ReplacementEstimate$257.08Shop/Dealer Price$286.20 - $365.46
1991 Ford F-350L6-4.9LService typeSpark Plug ReplacementEstimate$204.67Shop/Dealer Price$221.17 - $266.56
1996 Ford F-350L6-4.9LService typeSpark Plug ReplacementEstimate$222.55Shop/Dealer Price$243.55 - $302.36
1997 Ford F-350V8-7.3L Turbo DieselService typeSpark Plug ReplacementEstimate$724.41Shop/Dealer Price$798.13 - $1006.33
1997 Ford F-350V8-7.5LService typeSpark Plug ReplacementEstimate$248.07Shop/Dealer Price$276.92 - $355.98
1993 Ford F-350V8-7.3L Turbo DieselService typeSpark Plug ReplacementEstimate$724.41Shop/Dealer Price$798.56 - $1007.09
1993 Ford F-350V8-5.8LService typeSpark Plug ReplacementEstimate$248.07Shop/Dealer Price$275.46 - $353.43
1992 Ford F-350V8-5.8LService typeSpark Plug ReplacementEstimate$248.07Shop/Dealer Price$275.45 - $353.40
Show example Ford F-350 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.

Excellent Rating

(45)

Rating Summary
41
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Richard

21 years of experience
126 reviews
Richard
21 years of experience
Ford F-350 V8-7.3L Turbo Diesel - Car is not starting - Justin, Texas
Excellent work. He found the problem right away. It was a bad relay for the fuel pump.

Albert

23 years of experience
21 reviews
Albert
23 years of experience
Ford F-350 V8-7.5L - Exhaust Manifold - Indianapolis, Indiana
Albert was prompt, and above all TENACIOUS. I had a troublesome manifold that needed to be replaced and the process proved to be quite difficult. In my case, the repair required 2 visits from Albert. In the first visit, we learned that the smog system in my truck was preventing the faulty manifold from being removed. This pipe was literally in an impossible to reach spot, eventually preventing the job from being completed in the first visit. This didn't deter Albert from the challenge to get my repair finished. He assisted me in finding the appropriate parts and recommended solutions for me to get the smog pipe separated from the manifold. After visiting another local mechanic with a lift to separate the smog pipe from the manifold, Albert returned to do a complete manifold replacement in just a few short hours. The mechanic was courteous, quick, safe, clean and gave very comprehensive explanations to help me further maintain my truck. If I could, I would give Albert 10 stars, and I will definitely request him specifically for future work with yourmechanic. Thanks a million Albert, they really should double your pay!

Andrew

16 years of experience
657 reviews
Andrew
16 years of experience
Ford F-350 V8-5.8L - Car is not starting - Vancouver, Washington
Great experience.... he did a great job getting my Ford F-350 running....diagnostic genius.... in the pooring down rain.

Peter

44 years of experience
1397 reviews
Peter
44 years of experience
Ford F-350 V8-7.5L - AC Compressor - Peoria, Arizona
Peter is very professional and extremely knowledgeable. He is meticulous in his workmanship, making sure that nothing is missed and everything is the way it should be. Peter's interactions are honest and sincere. He is by far the best service technician that I have encountered. I highly recommend his services to anybody who needs repair work done to their vehicles.

Excellent Rating

(45)

Rating Summary
41
2
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2
41
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2
Number of Ford F-350 services completed
495+
services done by our mechanics
TOTAL NUMBER OF EXPERT Ford MECHANICS
1800+
experts on our platform

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