Engine - Bucks/Jerks/Hesitation/Stumble

89ford04

Article No. 89-5-8

^ BUCKS/JERKS - 2.3L HSC - VEHICLES WITH MANUAL

TRANSAXLE AND AIR CONDITIONING

^ HESITATION - 2.3L HSC - VEHICLES WITH MANUAL

TRANSAXLE AND AIR CONDITIONING

^ STUMBLE - 2.3L HSC - VEHICLES WITH MANUAL TRANSAXLE AND AIR CONDITIONING

FORD: 1988-89 TEMPO

LINCOLN-MERCURY: 1988-89 TOPAZ


CALIBRATION: 8-25F-R00, 8-25C-R00

WARNING: THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. PERFORMING THIS MODIFICATION ON OTHER ENGINE CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.

ISSUE: Stumble, hesitation or a buck/jerk condition while accelerating during engine warm-up with the A/C in the A/C or defroster mode may be caused by the engine fan controller. The EEC IV processor may misinterpret the electrical signal from the engine fan controller which causes the processor to miscalculate the spark advance.

ACTION: Perform normal diagnostics to determine if a new engine fan controller is required. Refer to the following procedure for service details.

1. Perform normal diagnostics. Service all EEC IV codes as required.

2. If normal diagnostics indicate the need to replace the engine fan controller, proceed to Step 5. If no EEC IV codes are displayed, proceed to Step 3.

3. Turn the climate control selector to the "OFF" position.

4. Road test the vehicle. If the driveability symptoms are gone, proceed to Step 5.

5. Install a new engine fan controller, (E93Z-8B658-A). Refer to the appropriate model year Car Shop Manual, Section 27 for removal and installation instructions.

PART NUMBER PART NAME CLASS

E93Z-8B658-A Engine Fan Controller B

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
890508A Diagnose And Install Fan 1.2 Hrs.
Controller
DEALER CODING
BASIC PART NO. CONDITION CODE
8B658 K3
OASIS CODES: 631900, 632000