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Home >> Chevrolet >> 1984 >> Corvette Standard >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Dual Unit TBI >> Adjustments >> Preliminary Throttle Valve Synchronization >> Throttle Rod Alignment Check
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Throttle Rod Alignment Check

  1. Actuate the rear unit throttle lever to bring both units to the wide open throttle position. Push throttle valves in direction of arrows. See Fig 1 . Move the throttle rod toward the front unit casting boss.
    Fig 1: Adjusting Throttle Rod This adjustment is performed after replacement of throttle body or manifold cover.
    G615
  2. Measure clearance between the shoulder of the stud and the side of ball surface on front unit. Clearance must not exceed .20" (5 mm) maximum.
  3. If greater, replacement item must be exchanged and adjustment procedure repeated. If correct, install new throttle rod and bearing assembly retaining clip.
  4. Move both throttle levers through total travel and fully close throttle valves. Push throttle levers in direction of arrows. Measure clearance between throttle rod and front unit casting boss. Clearance must be .04" (1.02 mm) minimum. See Fig 1 .
  5. If clearance is less than specified, remove throttle rod and bearing assembly retaining clip. Exchange replacement assembly and perform adjustment procedure again.
  6. Install air cleaner and ensure no binding is present in accelerator and throttle linkages.