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Crank, Fire, die, no start

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  • Crank, Fire, die, no start

    On the dyno with a PF4. Ford. Initial start instantly runs then dies. Now I have no spark. Everything is paired and functional. When I crank it shows RPM on the tablet but it goes to 200 then drops to 0 then 200 then 0 etc...

    Any help?

  • #2
    If RPM is erratic , then check the Cam/Crank sensors.
    Don't get too caught up in the numbers.
    Just give the Engine what it wants &
    Let the numbers be what they are.

    Jim McFarland....

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    • #3
      The connectors need to be inspected that their all seated.
      Try bypassing the main relay.....or put another relay in for testing.
      In my neighborhood, if you open your hood to check your oil, and the vehicle still runs after you close it.......Then your labeled the Neighborhood Mechanic.
      https://forums.edelbrock.com/filedat...?photoid=42773

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