1991 Nissan D21 Engine Tune-Ups & Maintenance

Tune Into Your Nissan D21

Is it tune-up time? If you're the type of driver who waits for something to go wrong with your vehicle, it might be time to change your ways, especially if you want your 1991 Nissan D21’s engine to last for a long time. Routine engine tune-ups can bring power back to your D21. They're designed to help your engine start easier and run more efficiently, which can lead to lower emission levels and better fuel economy. When you get routine engine tune-ups based on Nissan's recommendations, you can rest assured you’re investing in your D21’s long-term engine performance.

Routine Engine Tune-Up Service for Your Nissan D21

The Firestone Complete Auto Care location in your community offers several Nissan D21 engine tune-up services. The first is the standard Firestone Tune-Up. The standard Firestone Tune-Up includes new spark plugs (and installation!), a thorough inspection of engine components, and a lifetime parts warranty*. A second service option replaces the air and fuel filter in your D21. The third tune-up option is a fuel system cleaning service, which is a three-step process that removes varnish, dirt, and carbon deposits on your D21's fuel injectors, throttle body, and throttle plate. The result? Restored fuel system performance. Consider this when choosing a tune-up service for your D21: your vehicle’s maintenance record and mileage can determine which service is best. A one-size-fits-all engine tune-up procedure doesn’t necessarily exist. Chat with a Firestone technician before you jump into a specific service to ensure your engine tune-up money is well-spent.

Where Should I Go for My Nissan D21 Tune-Up?

Schedule your next 1991 D21 engine tune-up service at Firestone Complete Auto Care. Not sure when you’re due for a tune-up? Use Nissan’s recommended maintenance schedule as a reference point, or schedule an appointment ASAP if you notice any of these signs: shaking while the engine is idling, poor fuel economy, engine knocking, or an illuminated check engine light.

*Talk to a Firestone Complete Auto Care teammate for full terms and conditions on warranties.

1991 Nissan D21 Engine Tune-Up Q&A

  • What happens if my Nissan D21 spark plugs fail? Replace spark plugs on time or about every 30,000 miles or so. Without the spark of electricity created by spark plugs, your engine doesn’t have the combustion it needs to start — which could leave you stranded on the road. Always replace your spark plugs on time based on Nissan’s recommendations.
  • What do I do if I see a pool of liquid under my Nissan D21? Don't ignore puddles of fluid under your Nissan D21. It could signal a coolant leak, brake fluid leak, or an oil leak. Let any one of these leaks linger and it could cause engine damage.
  • Are hard starts and stops bad for my Nissan D21 engine? You can make your driving habits more engine-friendly. Hard starts and stops can increase the stress on engine parts, especially over many years. Boost your fuel economy and care for your engine by using gradual, smooth starts and stops instead.

1991 Nissan D21 Maintenance

Take care of your vehicle and it'll take care of you. Click on a service below to learn more about properly maintaining your Nissan D21.

1991 Nissan D21 Repair

Nothing lasts forever. Even your Nissan D21's many parts and pieces. When something breaks, we're ready. Click on a repair below to learn more about 1991 Nissan D21 repairs.

Schedule Nissan D21 Tune-Up

If your D21 is acting strange or making new noises, it could be engine tune-up time. Don’t wait until small problems get bigger. Make an appointment now.