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TROUBLESHOOTING AND ELECTRICAL
SYSTEM: PEDAL-START GAS VEHICLE
Troubleshooting Guide
18
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
Fuel tank is empty
Section 23 — Fuel System: Gasoline Vehicles
Fuel line or filter clogged
Section 23 — Fuel System: Gasoline Vehicles
Fouled spark plug
Section 22 — Engine (Subaru EX40)
Spark plug wire damaged or loose
Section 22 — Engine (Subaru EX40)
Loose wire connection at ignition coil
Test Procedures 15 –
and 16
Ignition coil failed
Test Procedures 15 –
and 16
Kill circuit grounded
Test Procedures 14 –
and 6 –
Engine turns but fails to start.
Fuel pump malfunction or failure
Section 23 — Fuel System: Gasoline Vehicles
Fan screen is partially blocked or plugged
Section 22 — Engine (Subaru EX40)
Governor is improperly adjusted
Section 23 — Fuel System: Gasoline Vehicles
Excessive back pressure in exhaust
Check and clean or replace
Fuel/air mixture is too lean; check EFI
Section 23 — Fuel System: Gasoline Vehicles
Overloading
Reduce to rated load
Engine overheats.
Poor quality engine oil
Replace
Excessive carbon deposits on piston head or
in combustion chamber
Section 22 — Engine (Subaru EX40)
Spark plug heat range is incorrect
Section 22 — Engine (Subaru EX40)
Engine pre-ignites.
Unsuitable or contaminated fuel
Section 23 — Fuel System: Gasoline Vehicles
Exhaust valve is restricted with carbon deposit
Section 22 — Engine (Subaru EX40)
Muffler or exhaust pipe restricted with carbon
or other substance
Section 24 — Exhaust System: Gasoline
Ignition coil failed
Test Procedures 15 –
and 16
Air filter is dirty or clogged
Section 23 — Fuel System: Gasoline Vehicles
Governor is improperly adjusted
Section 23 — Fuel System: Gasoline Vehicles
Throttle linkage out of adjustment
Section 23 — Fuel System: Gasoline Vehicles
Low cylinder compression
Section 22 — Engine (Subaru EX40)
Spark plug failed
Section 22 — Engine (Subaru EX40)
Restricted fuel flow
Section 23 — Fuel System: Gasoline Vehicles
Loss of engine power.
Torque converter is not backshifting properly
Section 25 — Clutches: Gasoline Vehicles
TABLE CONTINUED ON NEXT PAGE
2017 Carryall 500 and 700 Maintenance and Service Manual
Page 18-5
Summary of Contents for Carryall 500
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