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This is a discussion on Ngk's within the External Engine forums, part of the LSx Technical Help Section category; Ok so I went to do the tune up on the 98 T/A today. Bought the MSD spark plug wires ...

  1. #1
    Junior Member supercharged666's Avatar
    Join Date
    Jun 2007

    1998 & 1999 Trans Am


    Ok so I went to do the tune up on the 98 T/A today. Bought the MSD spark plug wires and NGK TR55 spark plugs. I only have owned my T/A for 3 years now and do not know any of the service history before I bought it. My car had the stock plug wires on it but when I started to pull the spark plugs out I noticed that they were NGK TR55IX Ridium. Checked them out and noticed that there weren't really that much wear on them so I kept them in and just replaced the wires. My question is should I keep the IX's in or put in my new TR55's? Also ohm out my old wire and compared them to the MSD's. See the list below.

    Stock Wires With 90,000 Miles MSD Wires New

    #1 Cyl. 355.0 ohms 27.2-30.7 ohms
    #2 Cyl. 280.5 ohms
    #3 Cyl. 356.1 ohms
    #4 Cyl. 286.2 ohms
    #5 Cyl. 281.2 ohms
    #6 Cyl. 286.8 ohms
    #7 Cyl. 278.0 ohms
    #8 Cyl. 282.5 ohms

  2. #2
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Thornton, CO

    Red Tint Jewelcoat
    2008 Trailblazer SS

    Keep the TR55's for a year or two then drop them in.

    The ohm resistance seems like a lot, but honestly, it makes little difference with the very small distance the spark travels.

    I run MSD wires though as well.

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