How long are the stock spark plugs good for

MustangLife said:

I have 9,700 miles on my car with the stock plugs. How many miles do they usually last. My idle isn't as smooth as it used to be, but my timing is advanced through the chip. Should I leave them alone for a while. Or should I replace them. i race alot and have hit the rev limiter alot if that helps any. Also any tips tricks on removing spark plugs.

Thanks in advance
Josh

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Dan_Soprano said:

with an engine in good condition...i.e. ring and valve seals in good shape, the plugs should last you till roughly 75,000 miles before needing changed.

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TARZAN said:

Mine lasted to 50,000 adn what rurnt them was the fact that I iced down my intake :o
And the water that resulted from it melting gto down in my coilpacks......

They should last MUCH longer than 9,700 unless you a/f is off for some reason.

What all is done to you rcar?

-Will

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JonJon said:

Supposed to wrap a towel around the ice pack... so water -doesn't- do that.

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