W250 3/4 Ton Pickup 4WD V8-318 5.2L VIN T 2-BBL (1983)
In every case where this label is used, type in after - AUTHORITY OF - Technical Service Bulletin #25-03-83, and your dealer code below. Label PN
4275084 is available from Parts Supply.
Altitude Conversion Procedures
2.2L Rampage & Scamp - Automatic & Manual Transmission
^
Install the following parts:
1 - Main Metering Jet
PN 4131173
1 - Vacuum Reducer Package
PN 4293794
^
Install the Primary Main Metering Jet, PN 4131173, using procedures outlined in the service manual.
^
Install the Vacuum Reducer Package, PN 4293794, using the installation procedure attached.
^
Revise engine speeds as outlined below:
Application
Idle Set
Propane RPM
H.F.I.
Automatic Transmission
900
975
1500 (S-3)
Manual Transmission
775
850
1300 (S-3)
3.7L (225-1BBL) Truck - Automatic & Manual Transmission
^
Install the following parts:
1 - Vacuum Reducer Package
PN 4293798
^
Install the Vacuum Reducer Package, PN 4293798, using the installation procedure attached.
^
Revise engine speeds as outlined below:
Application
Idle Set
Propane RPM
H.F.I.
Automatic Transmission
650
725
1600 (S-2)
Manual Transmission
600
675
1600 (S-2)
^
Install VECIU Label, PN 4275084, next to original VECI label with information describing this modification.
5.2L 2BBL (318-2BBL) Trucks With Aspirators Automatic & Manual Transmission
^
Revise engine speeds as outlined below:
Application
Idle Set
Propane RPM
H.F.I.
Both Transmissions
750
850
1500 (S-2)
^
Install VECIU Label, PN 4275084, next to original VECI label with information describing this modification.
5.2L 4BBL (318-4BBL) Truck - Automatic & Manual Transmission
^
Install the following parts:
2 - Secondary Metering Jets
PN 3744772
1 - Step-Up Spring
PN 3621172
1 - EGR Valve
PN 4287675
^
Replace the Secondary Metering Jets, PN 3744772 - two required, using the procedure outlined in the service manual.
^
Replace the Step-Up Spring, PN 3621172, using the following procedure:
1.
Remove the step-up piston cover plate attaching screw and cover plate.
2.
Remove the rod connecting the choke shafts.