The 1982 C, K & P, and the 1983 C, K trucks use an intake manifold mounted secondary fuel filter, before the fuel enters the pump. This filter is an AC 10 micron paper replaceable element of the spin-on type. It is mounted to the rear of the intake manifold. See Figure 4-15.
SECONDARY FUEL FILTER C-K SERIES
REMOVAL:
1. Remove fuel filter lines from adapter.
2. Remove fuel filter.
3. Remove filter.
INSTALLATION:
1. Install filter to adapter, tighten 2/3 turn after contacting gasket.
2. Install adapter to intake manifold.
3. Install the fuel filter inlet line only.
Anytime the secondary filter is removed or replaced, air must be purged from the filter to prevent engine stalling or excessive cranking time to restart.
4. With the secondary fuel line disconnected, disconnect the pink electrical wire from the fuel injection pump to prevent the engine from starting.
5. Place an absorbent towel under the filter outlet.
6. Crank engine (for 10 seconds max.) until fuel is observed at the outlet port.
7. If fuel is not observed after 10 seconds, wait 15 seconds, repeat Step 6.
8. When fuel is observed at the outlet port, install the outlet line.
9. Reconnect pink wire at injection pump, and reinstall air cleaner.
10. Start engine and allow to idle for several minutes to purge remaining air.
11. Check all fittings and filter for leakage; remove absorbent towel.