Chevrolet Light Duty Truck 1973 Service Manual page 466

6 M - 4 2 ENGINE FUEL
Rochester Monojet (1 bbl.) C arburetor.................. 6M-43
Rochester 2GV (2 bbl.) C arburetor......................... 6M-51
Fig. 4P--lnstalling V-8 Engine Fuel Pump
CARBURETOR DIAGNOSIS
MODELS M , M V -2 G , 2 G V -4 M , 4M V .
PROPER CARBURETOR OPERATION IS
DEPENDENT UPON THE FOLLOWING
1. Fuel Supply
2. Linkage and emission control systems.
3. Engine compression.
4. Ignition system firing voltage
5. Ignition spark timing
. Secure intake manifold
6
7. Engine temperature
. Carburetor adjustments
8
ANY PROBLEMS IN THE ABOVE AREAS
CAN CAUSE THE FOLLOWING
1. No start or hard starting - (hot or cold)
2. Rough engine idle and stalling
3. Hesitation on acceleration
4. Loss of power on acceleration and top speed
5. Engine to run uneven or surge
. Poor fuel economy
6
7. Excessive emissions
BEFORE PROCEEDING WITH CARBURETOR
DIAGNOSIS, CHECK THE PRECEDING
ITEMS FIRST.
INDEX
Rochester 4MV (4 bbl.) Carburetor......................... 6M-58
Fuel Pum p.........................................................................
1
M
6 -66
LIGHT DUTY TRUCK SERVICE MANUAL