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Thread: tuning 97 tj

  1. #1

    Unhappy tuning 97 tj

    i have a 97 tj 4.0 manual with stock computer, gears, and harness. the owner has changed the camshaft to an obd1 4.0 camshaft so the computer is unhappy. i need advice on adjusting for lobe separation and duration to make the computer happy please

    oe is 408/[email protected] ls 107.5 duration 188/190@ .050

    Current cam is 424/[email protected] ls 112 duration 197/[email protected]

  2. #2
    Tuner
    Join Date
    Jan 2020
    Location
    Yuma ,AZ
    Posts
    103
    Quote Originally Posted by [email protected] View Post
    i have a 97 tj 4.0 manual with stock computer, gears, and harness. the owner has changed the camshaft to an obd1 4.0 camshaft so the computer is unhappy. i need advice on adjusting for lobe separation and duration to make the computer happy please

    oe is 408/[email protected] ls 107.5 duration 188/190@ .050

    Current cam is 424/[email protected] ls 112 duration 197/[email protected]
    you should not have any issues with the current cam

  3. #3
    it spits and sputters intermittently at idle and runs super rich all the time. i figured the lobe separation would be causing the cylinder temps to be super inconsistent with excess fuel at times