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Please help setting parameters EZ Efi Multiport 2.0

Discussion in 'FAST Support Forum' started by chevy468ci, Oct 3, 2017.

  1. fabr

    fabr Member

    Joined:
    Jan 23, 2017
    That is fine. The goal is to be zero lash before setting preload. You should be good to begin tuning now.
     
  2. A A

    A A Well-Known Member

    Joined:
    Jun 22, 2014
    Just to be sure about something... are you experiencing any excessive clatter at the valves you mentioned not having the same resistance on the nut as others - since you adjusted them? If there is excessive clatter, you may have contaminated or failing lifters. If that is the case, a new set of lifters may be in order - at least for the affected cylinders.

    Hydraulic roller lifters are very susceptible to any oil contamination. But, I had one defective COMP lifter fail six months after a new build, and had to replace the pair on cylinder seven. On inspection, I found the one lifter had bad machining. No other lifters in the full set have given a problem in the years since. I could only hear that lifter some at cold idle when it first began failing. It gradually became worse, eventually could be heard with the engine warmed, and fully collapsed. Just a fluke that time, and the first time I ever had any new lifter fail in 50 years of builds.

    If you suspect there may be any contamination, use a quart of Rislone engine treatment with your oil for a few changes. It works well, and often will flush out any contamination making hydraulic lifters noisy - restoring proper operation.
     
  3. Fastnofast

    Fastnofast Member

    Joined:
    May 16, 2017
    Before any sign of failure in the lifters it is normal that some lifters are hard to move and other are easy because even in a new set of lifters, some lifters are empty of oil and some are full of oil. Empty lifters give little resistance.
     

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