Engine - Stumble/Miss When Lamps Are Operated

Article No.
88-16-16

^ MISS - 4.9L, 5.0L, 5.8L, AND 7.5L EFI - OCCURS WHEN HEADLAMPS, HAZARD LIGHTS, TURN SIGNALS ARE TURNED "ON/OFF"

^ STUMBLE - 4.9L, 5.0L, 5.8L, AND 7.5L EFI - OCCURS WHEN HEADLAMPS, HAZARD LIGHTS, TURN SIGNALS ARE TURNED "ON/OFF"

LIGHT TRUCK:
1987-88 F-SERIES, BRONCO

ISSUE:
An engine miss or stumble when the headlamp hi-beams, hazard, stop or turn signals are turned "ON/OFF" may be caused by a voltage spike. A voltage spike may be induced into the EEC IV ignition system and read by the EEC IV processor as a PIP signal. This creates false timing information resulting in the miss or stumble. Vehicles that are used to pull trailers (electrical brake equipped) may have similar symptoms.

FIGURE 16:

ACTION:
To correct this, install a ground strap between the battery negative (-) terminal and the radiator support bracket using existing attaching hardware or a # 10 sheet metal screw, Figure 16.

PART NUMBER PART NAME CLASS

E8UZ-19A095-A Ground Strap C

OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION: 881616A
TIME: 0.3 Hr.
DLR. CODING: Basic Part No. 14401
Condition Code: 53