940 L4-2320cc 2.3L DOHC VIN 89 B234F FI (1991)
a. Check wire between relay socket and fuel pumps. Repair as needed.
b. Check fuel pump ground wires. Repair as needed.
c. Check wire between terminals 85 and 87/1 with an ohmmeter. Repair as needed.
If all wiring (as tested above) is in good working order, replace and retest with new fuel pump(s).
Measuring System Pressure
10.
With fuel pumps running, measure system pressure.
Reading: 300 kPa (43 psi)
If reading is correct, proceed with step 11.
If reading is incorrect, proceed with the next steps.
Checking System Pressure
a. Pressure too high:
Remove electrical lead between terminals 30 and 87/2.
Remove fuel return pipe from pressure regulator and blow through it. Repair or replace if restricted and retest.
Remove vacuum hose from pressure regulator and blow through it. Repair or replace if restricted and retest.
If both lines are free of restriction and fuel pressure remains to high, replace and retest with new fuel pressure regulator.
Checking System Pressure
