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99 7.4L timing adjustment?

Discussion in 'Performance & Fuel' started by geardrivensoul, Dec 17, 2010.

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  1. geardrivensoul

    geardrivensoul New Member

    How is the timing set/djusted on the 99 7.4L 454's?
  2. MrShorty

    MrShorty Moderator 1000 Posts 100 Posts

    I'm pretty sure it is the same procedure as my '98 5.7. You hook up a medium to high end scanner (one that is capable of reading the cam retard parameter. this seems to be the hardest part of the procedure). Then adjust the distributor until cam retard is between -2 and +2 degrees.
  3. tmise

    tmise New Member

    anybody know if distributor cap on 1999 Chevy 7.4L is supposed to be able to rotate freely, have been having a hard time getting truck to start and noticed it was really loose?
  4. redvett

    redvett New Member

    Absoutely NO that will change the cam retard if the whole distributer rotates. See if the clamp down bolt is loose and have someone set the cam retard.
    Last edited: Apr 7, 2013

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