Hyundai Sonata 1991 Shop Manual page 239

Fuel Tank And Fuel Line
GENERAL
Y31CHQA
Symptom
Probable cause
Remedy
Engine malfunctions Bent or kinked fuel pipe or hose Repair or replace
due to insufficient fuel
Restricted fuel pipe or hose
Clean or replace
supply
Restricted fuel filter or in-tank fuel filter
Replace
Water in fuel filter
Replace the fuel filter or clean the
fuel tank and fuel lines
Dirty or rusted fuel tank interior
Clean or replace
Malfunctioning fuel pump (Restricted filter Replace
in the pump)
Evaporative emission
Incorrect routing of a vapour line
Correct
control system malfunc- Disconnected vapour line
Correct
tions (when tank cap is Folded, bent, cracked or clogged vapour
Replace
removed, pressure re-
line
leasing noise is heard) Faulty fuel tank cap Replace
Malfunctioning overfill limiter (Two-way
valve)
31-14