Carburetor - Stalling/Low Idle Speeds
83ford25Article No. 83-2-7
STALLS, LOW IDLE SPEEDS (2.3L)
FORD 1980-82 MUSTANG, FAIRMONT
LINCOLN-MERCURY 1980-82 CAPRI, ZEPHYR
CALIBRATIONS:
All without evaporative fuel bowl thermal vent valve (9E589)
Low idle speed and engine stalls at idle that cannot be resolved through external adjustments may be caused by contamination entering the carburetor fuel bowl through the bowl vent system. The following procedure will help identify and service these concerns.
1. Remove the air cleaner assembly and set aside.
2. Disconnect bowl vent line, fuel line and vacuum lines from air horn portion of the carburetor assembly.
3. Remove the air horn assembly and inspect the fuel bowl for contamination, if it is present, proceed to Step 4.
NOTE: The following cleaning procedure will be performed with the carburetor main body still on the manifold. EXTREME CAUTION must be taken not to allow any foreign material to enter the venturi area.
4. Remove the fuel from fuel bowl.
5. Clean out all contamination.
6. Remove primary and secondary jets, high speed bleeds and well tubes. Take care to note locations as they differ primary to secondary.
7. Remove enrichment valve and assembly.
8. Remove accelerator pump cover, diaphragm and spring.
9. Remove accelerator pump discharge nozzle, screw and two gaskets.
10. Cover the primary and secondary venturis. With a magnet remove the two check balls from the accelerator pump channel.
11. Remove the secondary idle jet and idle jet retainer.
12. Using compressed air and the following sequence, blow out the carburetor passages.
a. Accelerator pump inlet from fuel bowl side.
b. Accelerator pump discharge from the discharge nozzle channel.
c. Enrichment valve channel.
d. Down through both idle bleed holes.
e. Down through both high speed bleed channels.
f. Main jet channels from the fuel bowl side.
g. Blow out the bowl vent hose inlet. Inspect bowl vent seal and inlet for contamination and remove if present.
FIGURE 3:
13. Clean all previously removed components - main jets, main well tube, etc.. After cleaning reinstall components in the reverse order of removal (Step 6-11) taking care to maintain proper location. Refer to Figure 3, View A for torque specifications.
14. Install the air horn using a new air horn gasket (9561). NOTE: Do not connect the bowl vent line at this time. Install fuel line and vacuum lines disconnected in Step 2.
15. Disconnect the bowl vent line at the rubber to metal line at the right hand frame rail (Figure 3, View B). Blow out the line from the carburetor end.
To prevent reoccurence of the contamination, the following modification must be employed.
16. Cut the bowl vent line, at mid length, between the carburetor and the steel line. Install a D8TZ-9E589- B thermal vent valve. (NOTE: Sufficient tubing must be removed to accommodate the thickness of the valve) (Figure 3, View B). The valve must be installed with the white side towards the evaporator canister.
17. Connect the bowl vent line at the carburetor and rubber to steel line at the frame member.
18. Start the engine, allow to reach operating temperature, check and reset idle speeds, as required.
19. Install the air cleaner assembly.
Obtain an Authorized Modifications decal and list the date, dealer number and summary of alterations performed. Select a prominent place adjacent to the Vehicle Emission Control Information decal suitable for installing the Authorized Modifications decal. Clean the area, install the decal and cover it with a clear plastic decal shield.
PART NUMBER PART NAME CLASS
E0PZ-9561-B Air Horn Gasket B
D8TZ-9E589-B Thermal Vent Valve A
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP 9589-A-82
TIME: 1.1 Hrs. DLR. CODING: Basic Part No. 9E589 Code: 39