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When should you replace spark plugs and wires. on 1990 Buick LeSabre

they seem to doing the job but at some point they need to be replaced or how do you check them to see if there time has come. 98,000 on the vehicle. thanks

Asked by for the 1990 Buick LeSabre
rep every 50k miles or as required
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1 more answer
Don't grab them with your bare hands, ouch. Ten years is a long time, 20 is longer. It would be a good idea for age reasons to have the plugs and wires replaced.