Cars & Vehicles Auto Parts & Maintenance & Repairs

How to Tune Up a 1997 Pontiac Grand Prix GT

    • 1). Allow the engine to cool. Removing spark plugs from a hot engine may result in damage to the cylinder heads.

    • 2). Remove the front three spark plugs by twisting and pulling the plug wires off of the spark plugs. Remove the spark plugs with a spark plug socket and ratchet from the socket set. Screw the new spark plugs into the engine and tighten them securely with the spark plug socket.

    • 3). Replace each of the first three plug wires, one at a time, with a new wire from the set. Use a small screwdriver to unclip the plastic retainers that the wires are routed through. On the 1997 Grand Prix GT, the front three plugs are closest to the coil pack on the front of the engine. They will be the shortest three plug wires in the new set. Compare each old plug wire with the new plug wires and select the one that is closest in length.

    • 4). Reach behind the engine, between the engine and the firewall, and remove the back three plug wires from the spark plugs. It is not necessary to unbolt the front motor mounts and rotate the engine on the 1997 Grand Prix GT. There is room between the firewall and the engine to reach the plug wires. Remove and replace the old spark plugs with new spark plugs. Remove the rear three plug wires, one at a time, from the engine and replace with a new wire.

    • 5). Remove the air filter cover and the flexible duct that secures it to the throttle body using a screwdriver. Remove the mass airflow sensor (MAF), attached to the throttle body, with a medium sized screwdriver. Clean the throttle body and throttle plate inside with throttle body cleaner. Stubborn residue can be gently scrubbed away with an old toothbrush. Wipe the throttle body dry with paper towels.

    • 6). Reassemble the MAF and the air filter cover. Hold the gas pedal to the floor and start the engine to clear out any excess throttle body cleaner.

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