73 L48 tune up - NCRS Discussion Boards

73 L48 tune up

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  • Douglas C.
    Very Frequent User
    • August 31, 1990
    • 384

    #61
    Re: 73 L48 tune up

    Originally posted by Anthony Cammaroto (69061)
    hi just was curious, what is your fast idle rpm's on cold start ,, my 75 L48 is at 1600 rpm's however some folks say it should be around 1200 to 1300 any help would be great thanks
    My under hood 1973 sticker says 1,600 for automatic and 1,300 for manual. My 4 speed is set to 1,300. Seems like a comfortable setting also. After warm up idles around 800, seems happy there also.
    Doug

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