CARBURETOR AND THROTTLE LINKAGE 6E- 49
DIAGNOSIS
CARBURETOR
Condition I
Hesitation or Stall Upon Light Acceleration
Correction
1. Check spark plugs and plug gap. Plug gap should
be
,030
in.
2. Check dwell and timing.
3. Adjust carburetor.
4. Accelerator pump should discharge fuel between
throttle plate and venturi wall with engine off. If aim
is not correct, use needlenose pliers to slightly bend
nozzle so proper aim is achieved. See Figure 6E- 10.
CORRECT ACCELERATOR
PUMP DISCHARGE
NOZZLE AIM
\
Figure 6E-10 Pump Shot Aim
Road test car. If hesitation still exists, check for the
folI0 wing:
1. Plugged accelerator pump discharge nozzle.
2. Dirt in accelerator pump circuit.
3. Defective inlet check ball.
4. Defective accelerator pump pressure relief valve.
5. Defective accelerator pump diaphragm.
6. Maladjusted accelerator pump linkage.
Condition II
Hard Start Afier Hot Soak
Correction
Perform Steps l-4 in Condition I.
Condition Ill
Hard Start When Engine Is Cold
Correction
1. Align groove on choke cover with pointer on
choke housing. See Figure
6E-17.
2. Set fast idle.
3. Replace distributor points if pitted.
4. Check spark plugs and gap at
,030.
5. Set dwell and timing.
If above procedure does not correct problem, replace
with new automatic choke assembly.
Condition IV
Rough, Erratic, or No Idle
Correction
1. Check spark plugs and gap at
,030.
2. Check dwell angle and ignition timing.
3. Clean idle jet and passages with air hose. See Fig-
ure
6E-5.
4. Check manifold to head bolt torque. Should be 33
lb.ft.
5. Check automatic choke linkage alignment.
6. Adjust carburetor.
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