Engine - Hard Start After Hot Soak

Article No. 86-12-11

HARD START - WARM ENGINE (HOT SOAK) - 3.0L EFI - VEHICLES BUILT JOB NO. 1 TO MARCH 20,1986


FORD 1986 TAURUS

ILNCOLN-MERCURY 1986 SABLE

Hard starting with a warm engine after a short shutdown may be caused by low fuel pressure. This may be caused by installation of the wrong fuel pump/sender assembly. The following diagnostic procedure should be used to verify that the correct fuel pump has been installed.

1. Remove the air cleaner.

2. Disconnect fuel pressure regulator vacuum line.

3. Attach Fuel Pressure Gauge, T80L-9974-A, or equivalent, to the diagnostic valve on the fuel rail assembly.

4. Start engine and check fuel pressure reading at idle.

If the fuel pressure is low (less than 35 psi), drop the tank and determine if the correct pump/sender has been installed by part number identification. If the number is not legible, remove the pump/sender assembly and check the physical characteristics:

Physical
Pan Number I.D. Characteristics
Incorrect 2.5L E6DF-9H307-AC Fuel pump hose attach-

Pump/Sender or ment is at the side of

E6DF-9H307-EC the pump.

Correct 3.0L E6DF-9H307-BD Fuel pump hose attach-

Pump/Sender or ment is at the top of

E6DF-9H307-CD the pump.
or E6DF-9H307-DD

If the wrong pump/sender assembly has been installed, replace it with the correct assembly.

PART NUMBER PART NAME CLASS

E6DZ-9H307-B Fuel Pump/Sender B
Assembly
E6DZ-9H307-C Fuel Pump/Sender A
Assembly
E6DZ-9H307-D Fuel Pump/Sender R
Assembly


OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.
OPERATION: SP9307A86 - Check fuel pump pressure
TIME: 0.3 Hr.
OPERATION: SP9307B86 - Check fuel pump pressure and replace fuel pump/sender
TIME: 1.2 Hrs. DLR. CODING: Basic Part No. 9H307 - Code: L3