Surge - Moderate to Heavy Acceleration Tempo/Topaz ATX
Attachment BSome early production Tempo/Topaz vehicles with the ATX may experience a surge condition under moderate or heavy acceleration. To alleviate this condition the following diagnostics should be performed:
1. Verify the drive complaint by performing a road test. Ensure symptom is not a result of A/C clutch cycling.
2. Perform "quick" EEC system check; correct system faults as required. If system is O.K., go to Step 3.
3. Replace carburetor with E43Z-9510-ZE. Refer to Car Shop Manual, Section 24, if necessary.
4. Replace the transmission TV shaft and lever assembly with E43Z-7F480-C. This must be done with the carburetor change to prevent a bind or hang-up of the TV control linkage. The new part (shaft) has a 17~ index revision on the tang which attaches to the carburetor lever.
5. Check the vacuum line to the vacuum reservoir located at the right front fender apron. If the vacuum line was previously plugged per GFB 8376 (8/19/83), remove the connector and reconnect vacuum line to reservoir. The carburetor calibration eliminates the need for this previous change.
6. Check/adjust the TV control linkage. See Section 17-25-18 of the Manual.
7. Check/adjust the curb idle speed. Refer to the Engine Decal.
8. Road test vehicle from Stop to 55 mph doing light, medium are heavy accelerations for approximately 3 miles to verify fix.
9. Install a Ford Modification Decal denoting the above changes.
NOTE: These carburetors are in short supply, and will be until November 9, 1983.
SURGE - MODERATE TO HEAVY ACCELERATION - AMBIENT OVER 95~ F
If surge occurs in ambients over 95~, perform the following steps:
1. Verify the complaint by performing a road test.
2. If the processor is a "PA" suffix, change it to an "SA" suffix and road test. If the complaint is still evident, proceed to step 3.
3. Proceed with a carburetor change, to a "ZE" level using steps 4 through 8 above.
4. Install a Ford Modification Decal denoting the above changes.
Attachment I Page 1 of 2
1984 TEMPO/TOPAZ
DRIVEABILITY DIAGNOSTIC/CORRECTIVE GUIDE
Driveability Concern Description
^ Vehicle exhibits a "sag", hesitation or surge after the 1-2 shift point on a light to moderate acceleration.
Transmission
ATX 4-26E R0 4-26D R16 & R18 4-26S R13 (50S)
Service Action/Repair
NOTE: This procedure replaces that shown in the August 19, 1983 dealer letter.
A. Installation of wiring barness E43Z-14A595-C:
1. Remove sight shield cover and save.
Figure 1:
2. Install wiring harness E43Z-14A595-C per instructions on Figure 1.
3. Install sight shield.
NOTE: WHEN PERFORMING QUICK TEST (STAR), IT WILL BE NECESSARY TO DISCONNECT ABOVE HARNESS AND RECONNECT ORIGINAL ECR HARNESS. FAILURE TO TO RECONNECT WILL RESULT IN THE QUICK TEST INDICATlNG AN EGR MALFUNCTION.
Figure 2:
B. Capping off Reservoir Vacuum Source:
1. Locate the 5/32 (black with red stripe) vacuum hose to the vacuum reservoir. This hose is routed along the right front fender apron between the shock tower and the radiator overflow bottle. (Figure 2)
2. Cut the hose and install (2) connectors (383003-S) and (2) caps (382444-S) at each end. (Figure 2)
NOTE: New Wiring Harness E43Z-14A595-C will be available by October 15, 1983.
Attachment I Page 2 OF 2
1984 TEMPO/TOPAZ
DRIVEABILITY DIACNOSTIC/CORRECTIVE GUIDE
Driveability Concern Description Transmission
^ Vehicle exhibits a rough idle or stalling condition just after start-up. This symptom occurs intermittently (rarely) and will usually disappear when the vehicle is restarted from a key "off" position or when the engine speed is increased on acceleration (vehicles built prior to September 1, 1983).
^ Vehicles exhibiting idle stalls or decel stalls within first mile of drive after cold start at 30-40~ F with high humidity may be experiencing carburetor icing.
Service Action/Repair
3. Secure both cut ends of vacuum hose to ensure access for possible future service requirements.
4. Perform a 3-mile drive (from a stop, accelerate to 55 mph with light, medium and heavy acceleration) to verify the above concern has been alleviated.
If drive concern still persists, replace carburetor. Do not reconnect vacuum hose.
Install a Ford Modification Decal denoting engine changes, and changes to quick test (Star) diagnostics.
Figure 3:
1. Install a diode harness (E0VY-11A001-A) assembly in series with the #32 start circuit at the starter relay as shown in Figure 3. This will prevent transient voltages generated by the starter relay from reaching the EEC processor.
A service fix consisting of a carburetor base gasket with a "heater pill" will be published October 18, 1983. A complete parts list and installation instructions will be provided in TSB 83-22.
Attachment II