Tune-Up Service in Twin Falls, ID — S&D Automotive

‍ ‍A rough idle you've been living with. Fuel economy that's dropped off without a clear reason. An engine that hesitates when you accelerate onto the Twin Falls overpass. These are common symptoms of an engine that needs a tune-up — and they're the kind of thing that gets written off as the car getting older rather than an engine that's working harder than it should. At S&D Automotive, we've been performing tune-ups since 1990. We look at what your vehicle actually needs at your current mileage, replace what's worn, and show you the difference.

What a Tune-Up at S&D Includes

The scope of a tune-up varies by vehicle age and condition, but typically includes:

• Spark plug inspection and replacement

• Ignition wire inspection and replacement (on applicable vehicles)

• Ignition coil testing and replacement if needed

• Air filter replacement

• Fuel filter replacement (on applicable vehicles)

• Throttle body cleaning

• Fuel injector cleaning or service

• PCV valve inspection and replacement

• Distributor cap and rotor replacement (on older vehicles)

• Battery and charging system check

• Timing check (on vehicles where applicable)

• Computer diagnostics to confirm any pending or active fault codes

Modern vehicles have changed what a tune-up means — platinum and iridium spark plugs can go 100K miles in some engines. We'll check your manufacturer's schedule and only replace what's actually due.

Signs Your Vehicle Needs a Tune-Up

• Rough idle — engine shakes or vibrates at a stop

• Hard starting, especially in cold weather

• Engine misfires — stumbling, hesitation, or a miss at certain RPMs

• Check engine light on (misfires and ignition faults often trigger codes)

• Noticeably reduced fuel economy

• Engine ping or knock under acceleration

• Reduced power — car feels sluggish especially when passing or climbing

When Was Your Last Tune-Up?

If you're not sure, it's probably been a while. Spark plugs are easy to overlook because a slightly worn plug doesn't trigger a warning light — it just makes your engine work harder and burn more fuel. On a 4-cylinder engine, you have four plugs firing 500 to 1,000 times per minute. When they're worn, the whole engine feels it.

Related Services at S&D Automotive

Diagnostics❯
If a misfire code is triggering your check engine light, we'll diagnose the specific cylinder and component before recommending a tune-up. See our Diagnostics page.

Battery & Electrical❯
Ignition coils and spark plug wires are electrical components. If electrical testing reveals a charging or ignition issue, it ties directly to tune-up work. See our Battery & Electrical page.

General Maintenance❯
Tune-up components like spark plugs and air filters are part of your vehicle's scheduled maintenance. See our Maintenance page.

Tune-Up FAQ

It depends on the vehicle and spark plug type. Older vehicles with conventional plugs may need service every 30,000 miles. Modern vehicles with iridium plugs can go 60,000–100,000 miles. Your owner's manual has the exact interval. When in doubt, bring it in and we'll check what's there.
Often yes, if the rough idle is caused by worn spark plugs or ignition components. But rough idle can also come from vacuum leaks, a dirty throttle body, a failing mass airflow sensor, or other issues. We diagnose first to confirm the cause.
A basic spark plug and filter service is usually 1–2 hours. If the diagnosis reveals additional work — ignition coils, fuel system cleaning, or other components — it may take longer. We'll tell you upfront.
Yes. Worn spark plugs reduce combustion efficiency, which means your engine uses more fuel to make the same power. A tune-up with new plugs and clean injectors often restores noticeable fuel economy improvement.
It could be. A misfire code (P0300 series) often points to spark plugs, ignition coils, or injectors. But the code alone doesn't confirm the cause. We'll run a full diagnostic first to find the specific fault before recommending parts.

What Our Customers are Saying:

Tune-Up Service Near Me — Twin Falls, ID

‍ ‍ S&D Automotive is at 139 Blue Lakes Blvd S in Twin Falls. If your vehicle isn't running the way it used to, bring it in. We'll diagnose the issue, show you what needs to be done, and give you an estimate before starting. We serve Twin Falls, Jerome, Kimberly, Buhl, Filer, Hansen, and the broader Magic Valley.

Serving Twin Falls and the Magic Valley

‍ ‍S&D Automotive is located at 139 Blue Lakes Blvd S in Twin Falls, Idaho — right off the main commercial corridor, easy to reach whether you're coming in from the east side of town, heading in from Jerome on Highway 93, or driving up from Kimberly or the farming communities south of town.

We regularly serve customers from:

Twin Falls — including the Blue Lakes corridor, the CSI area, and downtown
Jerome — 15 minutes east on Highway 93
Kimberly — south on Highway 50
Buhl, Filer, and Hansen — western Magic Valley communities
Hagerman, Gooding, and Wendell — for customers making the drive for a shop they trust
Travelers on I-84 — if you're passing through and need service, we'll get you back on the road

If you're in southern Idaho and need a mechanic you can trust, S&D Automotive has been that shop for over 25 years.