L-Series Sedan (3 Door) 2WD F4-1781cc 1.8L SOHC (SPFI) (1986)
Evaporative Fuel Vapor Return Hose: All Technical Service Bulletins
Evaporative Emissions - Rattle Noise
NUMBER 02-47-86
APPLICABILITY:
1986 SINGLE POINT INJECTION VEHICLES DATE 05-07-86
SUBJECT:
RATTLING NOISE IN LEFT ROCKER PANEL
Be advised that a complaint of a rattling noise in the left rocker panel of an SPI vehicle which occurs immediately after engine start-up, could be caused
by fuel vapor pulsations in the fuel return pipe.
This condition can be corrected by installation of a fuel damper in the vapor return hose. Installation instructions follow:
PARTS REQUIRED:
QUANTITY
PART NAME
PART NUMBER
1
Fuel Damper
42024GA080
2
Hose Clamp
742038300
TOOLS REQUIRED:
Phillips Screwdriver
10 mm Wrench
Diagonal Cutters
Safety Glasses
Marking Crayon
Tape Measure
1.
Verify noise. Relieve fuel pressure by disconnecting the fuel pump wiring connector which is found in the right rear, under the vehicle next to the
fuel pump. Run the engine until it stops. Disconnect the negative battery cable.
FIGURE 1 - MEASUREMENT SPECIFICATIONS
2.
Locate the fuel vapor return hose found on the upper left side of the throttle body assembly. Measure to a point 4 inches from the hose connection
and mark it. Measure from the mark 1 inch and mark it. Place a rag under the return hose to collect any remaining fuel and cut at both marks. (See
Figure 1).