Engine - Cranks But Will Not No Start

90ford03

Article No. 90-3-4

^ NO START - CRANKS BUT WILL NOT START - FUEL PUMP SHUT-OFF SWITCH (INERTIA SWITCH) ACTIVATED - VEHICLES BUILT BEFORE 1/05/89

^ STALL - WILL NOT RESTART - FUEL PUMP SHUT-OFF SWITCH (INERTIA SWITCH) ACTIVATED - VEHICLES BUILT BEFORE 1/05/89

FORD: 1987-89 ESCORT

LINCOLN-MERCURY: 1987 LYNX


This TSB article is being republished in its entirety to expand the model application to include the 1987 Lynx.

ISSUE: A no start or stall condition may be caused by a fuel pump shut-off switch (inertia switch) that has been activated. The switch is intended to shut off the fuel supply in the event of a collision. However, the switch may be activated by a jolt, like slamming the left rear door or hitting a large bump or pot hole.

ACTION: Relocate the inertia switch to an area that is less sensitive to bumps and jolts. Refer to the following procedure for service details.

1. Park the car on level ground for correct installation of the inertia switch bracket.

2. Remove the trim panel that covers the inertia switch.

Figure 1:

3. Remove all sound deadening and insulation from the new bracket mounting area on the wheel house, Figure 1.

4. Position the new inertia switch bracket (supplied in the kit) about 7-3/4" above the floor pan and against the wheel housing. Adjust the top of the bracket so it is level and the switch mounting face so it is vertical, Figure 1.

5. Center punch and drill six (6) .128 inch (# 30 drill) holes in the wheel house to fit the holes in the bracket tabs.

NOTE: IT IS VERY IMPORTANT TO INSTALL THE INERTIA SWITCH LEVEL. CHECK THE INERTIA SWITCH BRACKET FOR LEVELNESS BEFORE INSTALLING THE RIVETS.

6. Apply RTV sealer to the back of the mounting tabs. Fasten the bracket to the wheel house with six (6) stainless steel pop rivets from the kit (382568-S), 1/8 inch dia. X 7/16 inch long.

7. Seal the rivets with a small amount of RTV on the inside of the vehicle and with body undercoating on the outside in the fender well.

8. Remove the inertia switch and shield from the existing location and unplug the electrical connector.

9. Fasten the inertia switch and shield to the new bracket, using the old mounting screws.

10. Unwrap about three (3) inches of wire wrap from the wiring harness.

11. Pull the wiring loom to the new location and reconnect the inertia switch wires leaving a small loop (slack) at the bottom. Retape the wiring harness.

Figure 2:

12. Drill a 1-1/2 inch hole in the trim panel for the access plug (N802981-S), Figure 2.

13. Check the reset button on the switch to make sure it is in the down position.

14. After installing the trim panel, check to see if the reset button can be reached through the access hole.

15. Install the access plug from the kit, in the new location.

Figure 3:

16. Mark up the illustration in the Owners Manual with a red pen to show that the inertia switch has been relocated. Figure 3 is a typical example.

PART NUMBER PART NAME CLASS

E7FZ-9B364-A Kit - Inertia Switch Bracket CG

SUPERSEDES: 89-17-10
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
900304A Relocate Inertia Switch 1.0 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
9341 N2
OASIS CODES: 4500, 610200, 630 100