F 150 4WD Pickup V8-302 5.0L (1986)
IDLE FUEL MIXTURE-PROPANE ENRICHMENT METHOD
Propane Enrichment Procedures Are Not Applicable For The Following:
^
CFI Applications.
^
EFI Applications.
^
Truck Over 8500 GVW Applications.
^
5.8L MCU Police and Trailer Tow Vehicles w/7200 Carburetors.
1987
4-66
Carburetors, Fuel Charging Assemblies and Throttle Bodies
Idle Mixture Setting Procedures
IDLE FUEL MIXTURE-PROPANE ENRICHMENT METHOD
Passenger Car. 2.3L HSC w/1949-IV
Truck, Under 8500 GVW: 5.8L w/418OC-4V.
NOTE:
This procedure is applicable to the above engines only. If CO and HC are not within specificatlon, perform appropriate electrical diagnostic
procedure in Section 15.
I.
Vehicle Preparation: All Carburetors as noted above.
A.
Apply the parking brake, and block the wheels, Disconnect the automatic brake release, If so equipped, and plug the vacuum connection.
B.
Connect an analog tachometer, Rotunda 059-000010 or equivalent analog tachometer.
C.
If so equipped, ensure that the hot idle compensator is in a closed position and remains so throughout the test. Idle vehicle on kickdown step
of fast idle cam for three to five minutes to ensure that HIC valve is closed.
D.
If so equipped, disconnect the fuel evaporative purge hose at the engine or the carburetor, (1.9L engines) and plug the connection. (Not
applicable to 5.8L Truck engines).
E.
If so equipped, disconnect the fuel evaporative purge hose at the air cleaner and plug the nipple. (Not applicable 5.8L Truck engines.)
F.
Disconnect the flexible fresh air tube from the air cleaner duct or adaptor. Using propane enrichment Tool T75L-9600-A or equivalent,
insert the tool hose approximately 3/4 of the way into the duct or fresh air tube. If necessary, secure the hose with tape.
G.
For vehicles equipped with Thermactor systems, revise the dump valve vacuum hoses as follows:
1.
For dump valves with two vacuum fittings, disconnect and plug the hose(s).
2.
For dump valves with one fitting or combination air bypass/air control valve, remove the hose at the dump valve and plug it. Connect a
slave hose from the dump valve vacuum fitting to an intake manifold vacuum fitting. (Not applicable to 5.0L and 5.8L Truck engines
with 2150A-2VFB).
3.
For 5.8L 4180C-4V Truck Disconnect and Plug Vacuum Hose to Dump Valve.
H.
When the above Steps have been completed, proceed to Section II.
Pages 4-69 & 4-70
1987
Carburetors, Fuel Charging Assemblies and Throttle Bodies
4-69
Idle Mixture Setting Procedures
IDLE FUEL MIXTURE-PROPANE ENRICHMENT METHOD
2.0L TRUCK UNDER 8500 GVW w/Aisan Carburetor
NOTE:
This procedure is for 2.0L Truck engines only, it is not for trucks over 8500 GVW. Propane specifications are not listed for these applications.
If CO and HC are not within specification, perform appropriate electrical diagnostic procedure, Section 15.
