Fuel Distributor: Testing and Inspection

Fig. 3 Sectional view of fuel distributor:

NOTE: The piston and its sleeve, in the fuel metering distributor, are machined to a tolerance of .00025", and are a matched set. When handling these parts it is advisable to avoid any impact or damage as the parts are not independently replaceable.
1. Remove the piston, Fig. 3.
2. Check for gum deposits and signs of seizing. If gum deposits are found on the piston clean it with clean gasoline.
3. Ensure that the piston does not bind inside its sleeve by sliding it back and forth while turning it.
4. If a high spot is found, replace the metering distributor.
5. Install a new "O" ring between fuel distributor and air flow sensor housing.
6. Reinstall the metering distributor.