Vehicle - Major Technical Changes: 2.626
a) Scheduled Maintenance^ 2000 Mile Check
The scheduled maintenance interval has been changed. It now includes a 2000 mile check, at which time the idle speed must be checked and adjusted if necessary.
Ref. W/S Manual 0:18
b) Fuel and Emissions
^ Idle Switch
The design of the idle switch has been changed for the 1985 626. To simplify the idle switch adjustment, follow the procedure below.
ADJUSTMENT PROCEDURE
Note: Fan and accessories must be off.
1. Warm up the engine to the normal operating temperature and run it at idle. (The fan should run at least once.)
2. Pull the canister upward and remove the canister from the mount. Do not remove the hoses from the canister.
3. Lay the canister out of the way below the intake manifold.
4. Connect a tachometer.
Fig. 8:
5. Connect a voltmeter to the idle switch terminals as shown. (Figure 8)
6. Increase the engine speed to above 2,000 rpm and then decelerate gradually.
7. Record the reading of the voltmeter.
At idle approx. 12V
Above 1,200-1,300 rpm below 1.5V
If the readings do not agree with the above specifications, turn the adjusting screw.
8. Reinstall the canister.
Fig. 9:
^ Anti-Afterburn Valve (AAV)
The AAV introduced in 1984 to improve driveability on the ATX models has been carried over to the 1985 ATX models. (Figure 9)
Ref. W/S Manual 4A:31
Fig. 10:
^ Float Level
The float setting has been changed. The new measurement is 11.5 (0.46 in.).
As with all Mazda carburetors this measurement is a starting point only. The final check is made at idle with the engine running. The fuel level must be at the middle to the top of the notch on the sight glass as shown. (Figure 10)
Fig. 11:
Ref. W/S Manual 4A:60 and 30:10 should be corrected to read 11.5 (0.46 in.).
^ Accelerator Pump
A double lip accelerator pump is now being used to improve driveability. The additional lip assures full fuel intake of the accelerator pump on the return stroke. (Figure 11)
Fig. 12:
^ Duty Readings
Duty is checked the same as in the past. Warm engine at specified idle speed. A reading with the center of fluctuation anywhere between 20~ and 70~ is ok. (Figure 12)
Fig. 13:
^ Duty Adjustment
Duty should only be adjusted
after a carburetor overhaul.
Duty must be adjusted with a
warm engine at 750 rpm in "N" for the MTX and at 700 rpm in "D" for the ATX.
Adjustment should be between 32~ - 40~. (Figure 13)
Note: ATX fluid must be at operating temperature.
Ref. W/S Manual 4A:63-64
Fig. 14:
c) Front Axle
^ Drive Shaft
The new tripod type joint introduced in 1983 to help reduce vibration will now be used in production on the 1985 ATX Models. (Figure 14)
Ref. W/S Manual 9:14
Fig. 15:
d) Steering
^ Power Steering Pump
The new ball bearing type power steering pump introduced on the 1984 models will be carried over to the 1985 models. (Figure 15) Ref. W/S Manual 10:40
Fig. 16:
e) Brakes
^ Brake Pads
The front brake pads on the 1985 626 will be semi-metallic with a minimum wear limit of 3 mm. (Figure 16)
Ref. W/S Manual 11:24