Engine - Low RPM Driveline Shudder

87ford16

LUGGING "SHUDDER" - 5.0L H.O. SEFI WITH Article No.
T50D TRANSMISSION - ENGINES BUILT 87-17-7
BETWEEN 02/18/87 AND 03/11/87


FORD: 1987 MUSTANG

ISSUE: Lugging "driveline shudder" in higher gears at low engine RPM after a sudden tip-in from closed throttle may be caused by the EEC IV TFI module. Under certain drive conditions, the current module may have insufficient (17~) dwell.

ACTION: To correct this, install a new EEC IV TFI module having a 30~ dwell. Refer to the following service procedure.

1. Road test vehicle to check for condition.

2. If condition exists, proceed to Step 3.

3. Remove existing EEC IV TFI module (Engineering part number E6SF-12A297-AA) and replace with (E43Z-12A297-A). The replacement module has 30~ dwell, which corrects the condition.




Obtain an Authorized Modifications Decal and list the date, dealer number, and summary of alterations performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.

PART NUMBER PART NAME CLASS

E43Z-12A297-A EEC IV TFI Module A

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible under Emissions Coverage
OPERATION: SP871707A
TIME: 0.9 Hr. DLR. CODING: Basic Part No. 12A297 - Code: 53