1985 2.6L-2V Light Duty Truck All Models With Federal Emissions Package (49 States)

Consisting of:

1 - Carburetor Jet Kit PN MD088294 containing:

#110 Primary Main Jet #175 Secondary Main Jet #100 Primary Air Bleed Jet #120 Secondary Air Bleed Jet

1 - Float Chamber Cover Gasket PN MD608639
1 - Choke Cover Screw Kit PN MD606977
1 - Carburetor Flange Gasket PN MD025344

INSTRUCTIONS

- Remove carburetor from engine and take off air horn per instructions in appropriate service manual.

FIGURE 7 - Mikuni Jet Locations:

- Remove primary and secondary main jets as shown in Figure 7.
- Install #110 primary main jet and #175 secondary main jet in the primary and secondary pedestals.

- Reinstall air horn on carburetor using new air horn gasket PN MD608639 and choke cover screw kit PN MD606977.

FIGURE 8 - Mikuni Air Bleed Jet Locations:

- Remove primary and secondary air bleed jets shown in Figure 8.
- Prepare carburetor for propane idle set by drilling out concealment plug.

- Install #120 secondary air bleed jet and #100 primary air bleed jet.

- Reinstall carburetor on engine using a new carburetor flange gasket, PN MD025344.

- Remove vacuum controlled orificed tank vapor valve (VCOTV) and the vacuum/line(s) to the valve.

- Remove the 3/16" tank vent line from the vapor canister and replace with 24" of 3/16" tank vent line and route directly to steel tank vent tube.

- Remove the manifold vacuum line from the manifold vacuum tee (originally to the VCOTV) and cap the tee.

- Remove the EGR delay valve at the corresponding EGR and carburetor ports and replace with 8" of bulk 3/16" vacuum line from stock.
- Start engine and warm up to operating temperature.

- Set idle rpm (curb) to 850 rpm and propane enriched rpm to 950 rpm.

- Set throttle kicker rpm to 1050 rpm.

FIGURE 9 - Authorized Modifications Label:

- Type in changes made on Authorized Modification Label, PN 4275086 (Figure 9), and affix to engine compartment next to VECI label.