1985 5.2L-2V Light Duty Trucks All Models With Federal Emissions Package (49 States)

Consisting of:

2 - Main Metering Jet #147 PN 4271983
1 - EGR Valve PN 4287678
1 - EGR Valve Gasket PN 4287938
1 - Carburetor Base Gasket PN 4095970


INSTRUCTIONS

Per instructions in appropriate service manual, perform the following:

- Remove carburetor from engine.

- Remove air horn from carburetor.

FIGURE 11 - Holley 2280 Main Metering Jets:

- Remove existing main metering jet (Figure 11).

- Install main metering jets provided, PN 4271983.
- Adjust vacuum kick to 0.150".

- Adjust mechanical unloader to 0.280".

- Remove EGR valve and scrape off old gasket material.

- Install new EGR valve PN 4287678 with new gasket PN 4287938.

- Start engine, check for leaks.

- Prepare carburetor for propane idle set and reinstall on engine using gasket PN 4095970.

- Start engine and check for leaks.

- Perform propane idle adjustment to 700 rpm (curb idle) and 770 rpm (propane enriched idle).

- Type in changes made on Emission Update Label and affix to engine compartment next to VECI label.