100 Wagon L5-2309cc 2.3L SOHC (NF) (1989)
Fuel Pressure Pulsation Damper: All Technical Service Bulletins
Fuel Pump - Buzz or Humming Noise
20-89-T07
Oct 89
5000/T
M.Y. 1984-1988
100/200
M.Y. 1989
Electric Fuel Pump - Buzzing or Humming Noise From Rear Of Vehicle
Cause:
Noisy fuel pump or pressure damper
Service:
Before replacing fuel pump:
1) Check gasoline quality in vehicle for
A) High alcohol content
B) Volatility
2) Check gasoline in tank for any contamination caused by outside influences.
3) Check to see if fuel pump pressure damper operation is causing noise.
(Replace pressure damper if necessary)