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Deceleration Unit

  1. Warm engine and adjust idle to 900-950 RPM. Stop engine and disconnect hose at vacuum unit. On 604, measure clearance between high idle adjusting screw and vacuum unit lever. Adjust with lever screw to 0.040" (1 mm).
    Fig 1: Deceleration Control System During Deceleration (604 Shown, 505 Similar)
    G09324609Courtesy of PEUGEOT MOTORS OF AMERICA, INC.
  2. Remove vacuum unit outer nut and gasket. Disconnect vacuum hose (green stripe) from vacuum tee and connect to unit. Turn adjusting screw to obtain idle speed of 1450-1500 RPM.
  3. Stop engine and reconnect hoses. Install vacuum unit gasket and outer nut, then retest deceleration system.
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