Service manual

TROUBLESHOOTING SERVICE MANUAL NUMBER 26
Page 1C-16 90-861329--1 MARCH 1999
Fuel System Lean
Cause Special Information
Empty fuel tank
Fuel shut-off valve closed (if equipped)
Vapor lock Engine will not start after warm engine
shut down
Automatic choke Stuck open, wrong adjustment
Fuel tank vent plugged
Engine will start initially. After a short time
of running, engine will stall and will not
restart for a period of time. Can verify it is
a vent problem by running engine with
filler cap loose. Fill cap will act as a vent.
Air leak on suction side of fuel system
Sucks air into fuel system reducing fuel
volume
Plugged or pinched fuel line
Fuel pump Low pump pressure
Carburetor Malfunction
Symptoms Cause
A. Needle and seat
B. Float adjustment
C. Saturated float
Flooding
D. Gaskets leaking
E. Cracked fuel bowl
F. Fuel percolation
G. Automatic choke
A. Idle rpm too low
B. Idle mixture screws
C. Idle passages dirty
Rough idle
D. Throttle valves not closing
E. Engine flooding
F. Vacuum leak
G. Throttle body heat passages plugged
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