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To change the spark plugs on an '89 Pontiac Firebird with long tube headers, first, ensure the engine is cool. Remove any necessary components that may obstruct access to the spark plugs, such as the intake or wiring harness. Use a spark plug socket and a ratchet to carefully unscrew and remove the old plugs, then install the new ones, ensuring they are properly gapped and torqued to the manufacturer's specifications. Reassemble any removed parts and reconnect the spark plug wires.

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1mo ago

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