Section 02 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
OTHER OBSERVATION POSSIBLE CAUSE REMEDY
Low fuel level (
carburetor models
) Check/refill
Carburetion dirty (
carburetor models
) Check/clean, refer to FUEL SYSTEM
Check pump, regulator and injectors.
Replace if necessary
Check if filter is plugged.
Low fuel pressure
(
RFI models
)
Check if a hose pincher is still installed.
Leaking crankshaft seal(s) or intake
manifold (
carburetor models
)
Pressure check engine, to the appropriate
ENGINE SHOP MANUAL
Restricted fuel valve
(
carburetor models
)
Check/replace
Loose carburetor (
carburetor models
)
Tighten carburetor
Stale or water fouled fuel Check/siphon and refill
Fuel filter dirty or restricted
Check/clean/replace
Clogged fuel injectors
(
RFI models
)
Remove and clean fuel injectors
Lean fuel mixture
Dry spark plug (except
when water fouled)
Defective sensor or ECM
(
RFI models
)
Check faulty codes in ECM memory, refer
to ENGINE MANAGEMENT
Flame arrester dirty or restricted
Check/replace
Partially closed choke
(
carburetor models
)
Check/adjust choke cable
Loose main jet (
carburetor models
)
Check, refer to FUEL SYSTEM
Faulty fuel injector(s)
(
RFI models
)
Remove and replace fuel injector(s), refer
to ENGINE MANAGEMENT
Defective sensor or ECM
(
RFI models
)
Check faulty codes in ECM memory, refer
to ENGINE MANAGEMENT
Rotary valve shaft seal leaking
Check/replace, refer to the appropriate
ENGINE SHOP MANUAL
Oil injection pump adjustment Check/adjust, refer to LUBRICATION
SYSTEM
Worn needles and seals
(
carburetor models
)
Check, refer to section FUEL SYSTEM
Excessive rotary valve clearance
(
if so equipped
)
Check, refer to the appropriate ENGINE
SHOP MANUAL
Fuel pressure fluctuating
(
RFI models
)
Inspect fuel pressure regulator. Refer to
FUEL SYSTEM
Rich fuel mixture
Fouled spark plug
High fuel pressure
(
RFI models
)
Check pump, regulator, injectors or if filter
is plugged. Replace if necessary
30 smr2005-046
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