940 L4-2320cc 2.3L DOHC VIN 89 B234F FI (1991)
Fuel Return Line: Testing and Inspection
1.
Check the fuel lines for damage, leaks and corrosion.
2.
Make sure the lines are properly seated in their rubber support grommets, otherwise they can cause a moaning noise in the passenger compartment.
3.
Inspect all hoses for age, cracks and oil saturation.
4.
Repair any defects as necessary.