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Home >> Plymouth >> 1979 >> Horizon Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> HOLLEY 2280 2-Barrel >> Adjustments >> Accelerator Pump

Accelerator Pump

  1. Remove bowl valve vent cover and spring. Use care not to dislodge or lose vent valve retainer. Install accelerator pump rod in inner hole. See Fig 1.
  2. Place throttle lever in curb idle position. Position a straightedge across bowl vent cover gasket surface above accelerator pump lever.
    Fig 1: Accelerator Pump Adjustment
    G09341209Courtesy of CHRYSLER GROUP, LLC
  3. Pump lever should just be contacting straight edge. See Fig 1. To adjust, bend accelerator pump rod. Install vent valve spring and cover.
    NOTE: If accelerator pump adjustment is made, bowl vent and mechanical power valve adjustment must be performed.
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