Lemans FWD L4-121 2.0L (1989)
Fuel Pressure: Testing and Inspection
Fuel System Schematic
WARNING: To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before connecting a fuel pressure
test. Refer to Fuel Pressure Release Procedure.
CAUTION
To reduce the risk of fire and personal injury:
1.
It is necessary to relieve fuel system pressure before connecting a fuel pressure gauge.
2.
A small amount of fuel may be released when disconnecting the fuel lines. Cover the fuel lines with a shop towel to catch any fuel leaking out.
Place the towel in an approved container once the lines are disconnected.
3.
DO NOT pinch or restrict nylon fuel lines to avoid severing. If nylon fuel lines become kinked, and cannot be straightened, they must be replaced.
4.
Wear safety glasses at all times.
FUEL PRESSURE TESTING
1.
Loosen fuel filler cap to relieve fuel tank pressure. (DO NOT tighten at this time.)
2.
Remove the fuel pump fuse from the fuse block in the passenger compartment.
3.
Start and run the engine until the residual fuel is consumed. Engage starter for three seconds to assure fuel pressure relief.
4.
Disconnect the negative battery cable.
5.
Obtain two section of 3/8 steel tubing about 10 inches long. Double flare one end of each section. Install a flare nut on each section. Connect each
of the above sections of tubing into the "flare nut to flare nut" adapters that are included in the J 29658 gage set, or equivalent tool.
6.
Attach the pipe and adapter assemblies to the J 29658 gage, or equivalent tool.
7.
Hoist the car.
8.
Disconnect front fuel feed hose from the fuel pipe on the body. Install a 10 inch length of 3/8 inch fuel hose onto the fuel feed pipe on the body.
Attach the other end of the hose onto one of the sections of the fabricated pipe. Secure the hose connections with clamps.
9.
Attach the front fuel feed hose onto the other section of the fabricated tubing. Secure the hose connection with clamps.
10.
Reconnect the battery cable. Start the engine and check for leaks.
11.
Observe the fuel pressure readings.
12.
Perform fuel pressure checks.
13.
Relieve the fuel system pressure. See steps 2 and 3.
14.
Disconnect the negative battery terminal and remove fuel pressure gauge.
15.
Tighten fuel filler cap and connect the negative battery terminal.
16.
Cycle the ignition switch twice, waiting ten seconds between cycles. Check for fuel leaks.
