10 Engine Parts Inspected During Your Vehicle Tune-Up

auto engine with text 10 engine parts inspected during your vehicle tune-up

The engine tune-up checklist includes both preventative and restorative engine assessment as well as final maintenance suggestions that will vary depending on the vehicle based on age, mileage, and specific manufacturer recommendations.

If you have no idea what happens under the hood during a tune-up, here is a quick checklist:

  1. The appearance of the spark plugs is check for wear and color. An engine in good condition will have spark plugs with light tan or gray insulator firing noses. Other colors, like dark gray or black, could be a sign of an engine problem like misfiring cylinders.
  2. Next, the performance of the spark plugs is tested. Auto care shops look for the color of the spark and whether it is properly igniting the fuel.
  3. The spark plug wires need to be checked as well to make sure they are not hard or cracked.
  4. After the spark plugs are checked over, the fuel filter is next up. There could be a big problem if it is clogged or dirty because then it isn’t filtering your fuel.
  5. Now it’s time to check the engine’s fuel pump to make sure there are no cracks or holes and ensure it functions properly.
  6. Inspecting the engine’s fuel injectors will guarantee that dirt and other deposits are not restricting the amount of fuel being delivered to the engine.
  7. Then, the fuel injector is inspected to make sure buildup isn’t affecting how the spark plugs fire.
  8. The engine timing and idle are adjusted as necessary.
  9. After that, the positive crankcase ventilation (PCV) valve is checked to make sure it isn’t clogged or leaking.
  10. Finally, the vehicle’s points and condenser are inspected.

Remember, there is no one-size-fits-all procedure, so some vehicles will require analysis of other engine components that are not listed above.

If you would like to know more about vehicle maintenance, contact the experts at Performance Auto at (334) 245-6600 today.


  1. My husband says that it is time to take the car in for a tune up, but I am curious to know what happens when you do this. It’s good to know that part of the process is to check the fuel filter, to see if there is any clogs or dirt. To me, I really appreciate knowing that this is being done to help with making sure that our car is running smoothly.

  2. I need a vehicle tune up here in the next few months. I like that you mentioned the importance of checking the spark plugs during this time. You want to be sure that you can start your car when needed.

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