Engine - Rough Idle/Hesitation/Stall At Idle

88ford07

Article No. 88-9-8

^ IDLE - ROUGH - 5.0L - THROTTLE POSITION SENSOR - VEHICLES BUILT BETWEEN 10/20/87 AND 2/15/88

^ HESITATION - 5.0L - THROTTLE POSITION SENSOR - VEHICLES BUILT BETWEEN 10/20/87 AND 2/15/88

^ STALL - AT IDLE - 5.0L - THROTTLE POSITION SENSOR - VEHICLES BUILT BETWEEN 10/20/87 AND 2/15/88

FORD: 1988 MUSTANG, THUNDERBIRD, CROWN VICTORIA

LINCOLN-MERCURY: 1988 COUGAR, GRAND MARQUIS, MARK VII, LINCOLN TOWN CAR

ISSUE: Intermittent rough idle, hesitation, or stall at idle may be caused by a broken wire inside the throttle position sensor.

ACTION: To correct this, use the following diagnostic procedure to determine if the throttle position sensor requires replacement. Refer to the throttle position application chart on this page for the correct service part.

1. Perform EEC IV Quick Test.

2. If Service Codes "23" or "63" are present or Service Code "63" is present in continuous memory, install a new throttle position sensor.

NOTE: THROTTLE POSITION SENSORS WITH A DATE CODE OF 8A13B (JANUARY 13, 1988) OR LATER AND A GREEN DOT ARE OKAY.

THROTTLE POSITION SENSOR APPLICATION CHART

Vehicle Application Service Part Number

Mustang (5.0L H.O.) E8ZZ-9B989-A

Thunderbird/Cougar E8ZZ-9B989-A

Crown Victoria/Grand Marquis E8AZ-9B989-A

Mark VII (5.0L H.O.) E8ZZ-9B989-A

Lincoln Town Car E8AZ-9B989-A


PART NUMBER PART NAME CLASS

E8AZ-9B989-A Throttle Position Sensor B
E8ZZ-9B989-A Throttle Position Sensor B

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION: 880908A
TIME: 1.2 Hrs. DLR. CODING: Basic Part No. DRIVE
Condition Code: P2