Mazda 1978 GLC Instructions; Maintenance And Servicing page 65

IF ENGINE BRAKE IS NOT EFFECTIVE OR ENGINE
HAS TENDENCY TO RACE, inspect these items:
1.
Throttle opener system.
2. Carburetor.
3. Anti-afterburn valve.
IF HEAT HAZARD WARNING LIGHT COMES ON
WHILE DRIVING, inspect these items:
1. Ignition system including spark plugs.
2. Air cleaner.
3; Have carburetor adjusted by your Mazda dealer.
4. Fuel tank and fuel supply to carburetor .
5. Throttle opener system.
6. Air control valve. (California vehicles only)
7. EGR system.
8. Heat hazard sensor.
IF FLOOR TEMPERATURE RISES EXCESSIVELY,
inspect these items:
1. Have carburetor adjusted by your Mazda dealer.
2. Ignition system including spark plugs.
3. Air cleaner.
4. Fuel tank and fuel supply to carburetor.
5 . Air control valve. (California Vehicles only)
6. Throttle opener system.
7. Heat hazard sensor.
S. Exhaust system and heat insulator.
7-21
IF OVERHEATING OCCURS, inspect these items:
1. Radiator coolant level.
2. Restriction of air flow through radiator.
3. Fan belt tension and condition.
4. Engine oil level.
5. Thermostat.
6. Ignition timing .
IF A "FLAT SPOT" OCCURS WHEN ACCELERAT·
lNG, inspect these items:
1. Carburetor.
2. Fuel lines, filter.
3 . Air cleaner.
BRAKES DO NOT WORK PROPERLY
1. After driving through water deep enough to wet
the brakes, apply the brakes gently in a safe area
while moving and hold until brake performance
returns to normal, but do it very cautiously.
Caution: Brakes may pull to either side.
2. Check the brake system warning light for indication
of fluid leaks in the system.
3. If the brake pedal is "spongy", have the hydraulic
system bled by your Mazda dealer.
4. Let brakes cool after heavy usage, such as mountain
driving.
5. If braking action is uneven (pulls to either side),
check tire pressures and brake lining pads.