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testing spark pug wires

This is a discussion on testing spark pug wires within the General Help forums, part of the LSx Technical Help Section category; when testing for plug wires what are they supposed to read ??...

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    testing spark pug wires

    when testing for plug wires what are they supposed to read ??

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    Life in the Fast lane sunsetorangess's Avatar
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    Met. Sunset Orange
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    Tested all major spark plug wires. My results...

    Your checking for Resistance
    J
    2001 SS, Its not the car its the Driver that matters....

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    ok then what should stock wires be reading at.

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    Quote Originally Posted by charlesss View Post
    ok then what should stock wires be reading at.
    Stock maybe around 400-500 ohms, my new MSD's measured 30 ohms for comparison to OEM vs. MSD.

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    mine read 288 ohms

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    can someone here please explain what the number on the spark plug body means. 41-974.. I replaced the original factory plugs 1 year ago, went with ac delco's #41-985.. had a misfire on cylinder # 2 took plug out cleaned it car ran alot better.. and now when i go on ac delcos webisite.. it gives me a cross reference # 41-110 also 41-952 just a bunch of different #s i want to find 41-974... or an equivalent of that plug....

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    Quote Originally Posted by charlesss View Post
    can someone here please explain what the number on the spark plug body means. 41-974.. I replaced the original factory plugs 1 year ago, went with ac delco's #41-985.. had a misfire on cylinder # 2 took plug out cleaned it car ran alot better.. and now when i go on ac delcos webisite.. it gives me a cross reference # 41-110 also 41-952 just a bunch of different #s i want to find 41-974... or an equivalent of that plug....
    The 41-110 is the OEM iridium i believe. that replaced the 41-985. should be gapped at .040

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    Quote Originally Posted by bryceslu View Post
    The 41-110 is the OEM iridium i believe. that replaced the 41-985. should be gapped at .040
    aren;t they supposed to be gapped at .060

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    The OEM platinum plugs were .060. GM came out with an iridium replacement that gaps at .040"

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