Engine - Intermittent Hard Start/No Start

91ford06

Article No. 91-5-3


^ HARD START - INTERMITTENT - 4.6L - LOSS OF COIL OUTPUT - CARS BUILT BEFORE 11/6/90

^ NO START - INTERMITTENT - 4.6L - LOSS OF COIL OUTPUT - CARS BUILT BEFORE 11/6/90

^ WIRING - LOOSE - 4.6L - 42-WAY CONNECTOR - LOSS OF COIL OUTPUT - CARS BUILT BEFORE 11/6/90


LINCOLN-MERCURY: 1991 TOWN CAR


ISSUE: An intermittent no start or hard start may be caused by loss of coil output. This is due to a poor connection of the 42-way connector.

ACTION: Check the connection at the 42-way connector if normal diagnostics indicate component replacement. Re-check diagnostics to make sure the components are functioning properly. Refer to the following procedure for service details.

Figure 1:

The 42-way connector connects the 9D930 and 12A581 wire assemblies. It is mounted on the brake booster under the master cylinder and is covered by a plastic shield as shown in figure 1.


1. Unbolt the 42 way connector.

Figure 2:

2. Remove the large molded rectangular gasket which seals the connector halves as shown in figure 2. Replace with (14A297) foam gasket.

3. Re-install connector, Tighten to 68-92 lb.in (7.6-10.4 N-m).

PART NUMBER PART NAME CLASS

F1VY-14A297-A Foam Gasket CG

OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
910503A Perform Diagnostics 0.5 Hr.
910503B Replace rectangular gasket 0.3 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
DRIVE J3
OASIS CODES: 602300, 603300