Inspection and Cleaning

1. The following materials are required for the cleaning procedure:
- A 1/2 to 1 inch wire stemmed horse hair or nylon bottle cleaner type brush
- Ford Carburetor Tune-Up Cleaner D9AZ-19579-AA or equivalent meeting Ford specification ESR-M14P9-A (Do not use choke cleaner solvents)
- Rubber gloves
- Eye protection
2. Remove lower intake manifold.
3. Disconnect the control linkage rod from the plastic bushings and levers and verify that the shaft assembly is causing the stick/bind/grab condition.
4. Holding the lower intake manifold vertical, liberally spray the cleaner into each of the bores concentrating the spray at each shaft/journal interface. Spray from both the top and bottom side of the bore, rotating the shaft by hand and pushing end-to-end to work the cleaner into the journal areas. Soak assemblies for 15 minutes.
5. Saturate the cleaning brush with solvent and scrub between the bores and valve plates. Apply some pressure on the brush while scrubbing, concentrating on the area where the shaft meets the housing journal.
6. Spray cleaner on the bores, plates, and shaft as needed to wash away any residue.
7. Use shop air to blow away the remaining residue. Concentrate on blowing the residue out of the shaft/journal area.
8. The shafts should now rotate freely without sticking or binding.

NOTE: If the lower intake manifold has been properly cleaned following the above procedure and the plates still do not rotate freely, replace complete lower intake manifold.

Linkage Rods:

9. Re-install the control linkage rod using new plastic bushing.