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Motor malfunction for mercruse vortec 350 5.7

Discussion in 'Technical Discussion' started by Rafi1959, Nov 9, 2013.

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  1. Rafi1959, Nov 9, 2013
    #1
    Rafi1959

    Rafi1959 New Member

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    Nov 9, 2013
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    Israel
    Would anyone know reasons for why mercruse vortec 350 5.7 motor, model 1996, won't go higher then 2200 rev? Carborator and plugs are ok.
  2. Capt J, Nov 9, 2013
    #2
    Capt J

    Capt J Senior Member

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    Check fuel pressure. I believe those motors have 2 fuel pumps. If one goes bad it will have enough fuel supply to run at slower speeds, but not enough to supply the higher demand.
  3. Fishtigua, Nov 9, 2013
    #3
    Fishtigua

    Fishtigua Senior Member

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    Jul 20, 2007
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    Guernsey/Antigua
    If I remember correctly, each Hi-Pressure fuel pump for Vortecs are matched by engine serial number. It's not an off the shelf part, very specific to each motor.

    Best to check with a good Merc shop.
    Last edited: Nov 9, 2013