900 L4-1985cc 2.0L SOHC (1988)
ALWAYS OBSERVE THE FOLLOWING SAFETY PRECAUTIONS WHEN WORKING ON THE FUEL SYSTEM:
^
NO SMOKING.
^
DISCONNECT NEGATIVE LEAD FROM THE BATTERY AND COVER THE TERMINAL POST.
^
HAVE A FIRE EXTINGUISHER NEARBY.
^
WEAR EYE PROTECTION.
^
WORK IN A WELL VENTILATED AREA (USE VAPOR EXTRACTION EQUIPMENT IF AVAILABLE).
^
AVOID PROLONGED SKIN CONTACT WITH FUEL AND WEAR SUITABLE GLOVES.
Parts Required:
Valve housing
P/N 89 77 779
Valve insert
P/N 89 77 761
0-ring (2)
P/N 93 84 280
Check Valve Replacement Procedure
1.
First inspect the return line in the car. If there is a yellow dot on top of the return line fitting (Figure 3), a new design check valve has already been
installed on the production line. Check to see that it has been installed correctly (Figure 5). If so, driveability problems are not- related to this 5.1..
2.
For cars that have no yellow dot, disconnect the return line fitting from the fuel tank (cars with Bosch fuel pump) or from the fuel pump cover
(cars with Walbro fuel pump). If the rubber flap on the check valve is intact then driveability problems are not related to a damaged check valve.
