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892 Old Claremont Road Charlestown, NH, 03603
  • MON: 8:00AM - 5:00PM
  • TUES: 8:00AM - 5:00PM
  • WED: 8:00AM - 5:00PM
  • THUR: 8:00AM - 5:00PM
  • FRI: 8:00AM - 5:00PM
  • SAT: Closed
  • SUN: Closed
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86 Route 10 South Grantham, NH, 03753
  • MON: 8:00AM - 5:00PM
  • TUES: 8:00AM - 5:00PM
  • WED: 8:00AM - 5:00PM
  • THUR: 8:00AM - 5:00PM
  • FRI: 8:00AM - 5:00PM
  • SAT: Closed
  • SUN: Closed
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472 Sunapee Street Newport, NH, 03754
  • MON: 8:00AM - 5:00PM
  • TUES: 8:00AM - 5:00PM
  • WED: 8:00AM - 5:00PM
  • THUR: 8:00AM - 5:00PM
  • FRI: 8:00AM - 5:00PM
  • SAT: Closed
  • SUN: Closed
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Engine Maintenance

J.S. Automotive Keeps Your Vehicle Running At Peak Performance

Stop and go driving throughout the Southwestern New Hampshire area can put unwanted demands on your engine. If you notice a sound coming from your engine and it's not the exhilarating roar of your engine at peak performance, come to J.S. Automotive right away. Many customers resolve engine performance issues and completely avoid the high cost of complex engine repairs with a simple tune-up. Call J.S. Automotive today or come by any of our locations.

J.S. Automotive Care Maintenance Services:

Check Engine Light
No one likes to see their car's "Check Engine" light come on. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. At J.S. Automotive, we can pull the code and diagnose the problem for you. Give us a call or stop by the J.S. Automotive location near you in Southwestern New Hampshire for our expert assistance.

Diesel
Although diesel engines don't require tune-ups and tend to last longer than gasoline engines, they do require regular maintenance. Typical maintenance tasks include:

  • Changing the oil & filter
  • Changing the air filter
  • Changing the fuel filter
  • Bleeding the fuel system
  • Draining the water separators
  • Refilling the urea injection system

You can count on the experts at J.S. Automotive to help your diesel engine last a long time.

Fuel Injection
Fuel injection is a system for admitting fuel into an engine. Since 1990, fuel injectors have completely replaced carburetors as the primary means of getting gasoline into the engine. A fuel injector atomizes the fuel by forcibly pumping it through a small nozzle (under high pressure). Failure of the fuel injection system means poor performance and ultimately destroys the engine. Make sure your vehicle's fuel injection system is maintained properly. For all your fuel injection maintenance and replacement needs, call or visit a J.S. Automotive location in Southwestern New Hampshire today.

Ignition
An ignition system is a system for igniting (using an electric spark) a mixture of fuel and air in a gasoline engine. A properly working ignition system means a properly starting engine and high performance from your car. For all your ignition system maintenance and replacement needs, call or visit J.S. Automotive today.

Ignition Wires & Cables
Ignition cables also known as spark plug wires are an important part of your car's ignition system. They transfer the spark from the ignition coil to spark plugs that ignite the mixture of fuel and air. The mixture starts the engine. Over time, ignition wires and cables get weak and break down. This makes it impossible for the spark to reach the engine cylinders. This results in the engine misfiring. The car will eventually fail to start. If it does start, it will run poorly. Common symptoms of faulty ignition cables and wires are: poor gas mileage, engine misfires, engine light is on, and engine may vibrate. If your car needs new ignition cables and wires, call or visit J.S. Automotive in Southwestern New Hampshire. Here, you will have the wires and cables changed by a top-rated mechanic.

Oil, Lube, and Filter
To keep running smoothly, your car highly relies on oil, lube, and oil filters. Oil helps in lubricating, cooling, and cleaning the internal engine components. With time, motor oil becomes contaminated. Your car needs an oil, lube, and filter change every three months (or 3,000 miles). When it is time for a lube, oil, or filter change, take your vehicle to J.S. Automotive in Southwestern New Hampshire.

Spark Plugs
A spark plug delivers electric current to the combustion chamber from the ignition system. Spark plugs that haven't been changed for a long time can cause ignition problems. At J.S. Automotive, we have automotive experts who will check and replace your spark plugs. For all your spark plug repair or replacement needs, call or visit the J.S. Automotive location near you in Southwestern New Hampshire today.

J.S. Automotive - Charlestown Engine Maintenance
Call Now: (603) 826-6874
Address: 892 Old Claremont Road Charlestown, NH 03603
Service Hours

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
Closed
Closed

Request An Appointment
Area Served:
Sunapee, New London, Hanover, Claremont, Springfield
J.S. Automotive - Grantham Engine Maintenance
Call Now: (603) 667-9094
Address: 86 Route 10 South Grantham, NH 03753
Service Hours

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
Closed
Closed

Request An Appointment
Area Served:
Sunapee, New London, Hanover, Claremont, Springfield
J.S. Automotive - Newport Engine Maintenance
Call Now: (603) 873-4175
Address: 472 Sunapee Street Newport, NH 03754
Service Hours

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
8:00AM - 5:00PM
Closed
Closed

Request An Appointment
Area Served:
Sunapee, New London, Hanover, Claremont, Springfield

Discover More About Engine Repair Services At J.S. Automotive in Charlestown

Undercar Services: Maintenance

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  • Car Care Aware
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WHAT OUR CUSTOMERS SAY

My wife's 5-yo Ford Edge developed a dead battery on Christmas day. We were able to jump start it, and drive it in to JS Auto in Grantham. Chris was kind enough to fit us in the next day, when they opened, run the full diagnostics, and install a new battery. They were fully booked that whole week, and had one person out sick, but he was able to fit us in even after the holiday. As usual, they were thorough, and did a great job. My wife and I are very appreciative of their going the extra mile to help their customers! , 12/26/2023

J.S. Automotive

J.S. Automotive - Charlestown 892 Old Claremont Road Charlestown, NH 03603 (603) 826-6874
J.S. Automotive - Grantham 86 Route 10 South Grantham, NH 03753 (603) 667-9094
J.S. Automotive - Newport 472 Sunapee Street Newport, NH 03754 (603) 873-4175

Ask any car or truck owner in Southwestern New Hampshire who they recommend. Chances are they will tell you J.S. Automotive.