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How do you know when it's time to change out the spark plug wires?
I notice the IPD catalogue says they last around 30k miles. I've put 5k onto the car which I bought last year, and have no idea when the Bougicord spark plug wires were changed.
Is it just a matter of waiting for problems?
Also can someone clue me in on the difference between 'resistor' plugs and regular plugs? I notice they sell both types. I have a 95 940 Turbo.
Is the Volvo plug the way to go.... or does NKG offer any advantages?
Thanks!
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