Essential Supplies:
* New spark plugs: The correct type and heat range are crucial. Consult your owner's manual or a parts store (providing your engine size) to determine the proper ones.
* Spark plug wires (if applicable): If your Blazer has a distributor, you'll need a complete set of spark plug wires. Coil-on-plug engines don't require these.
* Air filter: A new air filter improves engine performance and efficiency.
* Fuel filter: Replacing this is a good preventative maintenance step.
* PCV valve (Positive Crankcase Ventilation valve): This inexpensive part often gets overlooked but is important for engine health.
* Appropriate tools: This includes wrenches (socket set is best), possibly a spark plug socket with a rubber boot to avoid damaging the plugs, pliers, screwdrivers, and possibly a fuel line disconnect tool. A torque wrench is recommended for tightening spark plugs to the correct specification.
Potentially Needed Supplies (depending on the condition of your vehicle):
* Distributor cap and rotor (if applicable): Only needed if your Blazer has a distributor ignition system. Inspect these for wear before buying replacements.
* Ignition coil(s) (if applicable): If your Blazer has a coil-on-plug system and one or more coils are faulty, you'll need replacements.
* Throttle body cleaner: Cleaning the throttle body can help improve idle and performance.
* Shop rags or paper towels: For cleaning.
* Owner's manual: This is essential for torque specifications and other important information.
Before you start:
* Consult your owner's manual: This will provide specific instructions and torque specifications for your Blazer's engine.
* Disconnect the negative battery terminal: This is a crucial safety precaution to prevent electrical shocks.
Important Note: If you're not comfortable performing these tasks yourself, it's best to take your Blazer to a qualified mechanic. Improperly performing a tune-up can damage your engine.
