Alfa Romeo alfa 33 Workshop Manual page 33

Condition
Spark is good:
a. Check spark plug
b. Check ignition timing
Check fuel system
C.
d. Check cylinder compression
Spark is not good:
Ignition system is out of order
Fuel system is out of order
Low compression
COMPLETE CAR
Probable cause
Low or no current in primary
l
circuit
Rotor arm current leakage
l
Faulty spark plugs
l
Improper ignition timing
l
Faulty ignition coil
l
Cut-off in high voltage cable
l
Loose connection or cut-off
l
in primary circuit
Lack of fuel
l
Dirty fuel filter
l
Dirty or clogged fuel pipes
l
Faulty fuel pump
l
Faulty carburetor choke
l
Incorrect float level adjustment
l
Improper idling
l
Dirty or clogged carburetor jets
l
Clogged fuel tank breather pipe
l
Incorrect spark plug tightening
l
Incorrect valve clearance
l
Compression leaks from valve
l
seats
Seized valve stem
l
Corrective action
Check primary circuit for loose or
disconnected terminals
Verify that the electronic ignition unit
is properly functioning
Clean or replace
Clean, adjust electrode gap or replace
Adjust
Replace
Replace
Repair or replace
Refuel
Clean
Clean
Replace
Check and adjust
Adjust
Adjust
Disassemble and clean
Repair and clean
Tighten to normal
Adjust
Remove cylinder head and lap valves
Replace valve and valve guide
May 1983