Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine - Stumble or Stall At Low Speeds
1986 Ford Aerostar V6-183 3.0LSECTION Engine - Stumble or Stall At Low Speeds
88ford15
^ HESITATION - 3.0L - DURING LOW SPEED DRIVING
^ STALL - 3.0L - DURING LOW SPEED DRIVING
Article No. 88-14-15
LIGHT TRUCK: 1986-87 AEROSTAR
ISSUE: An intermittent stumble or stall while driving at low speeds up to 8 mph (13 km/h) may be caused by the EEC IV processor shutting off the fuel injector system. The EEC IV processor may incorrectly read sensor input signals and interpret them to indicate a vehicle speed that triggers a shut down of the fuel injector system.
ACTION: To correct this, install a new level EEC IV processor. Refer to the following EEC IV processor application chart for the correct service replacement part number.
New EEC IV Processor Transmission
E7PZ-12A650-EA Automatic
E7PZ-12A650-FA Manual
Obtain an Authorized Modification 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 Modification Decal. Clean the area, install the decal and cover it with a clear plastic decal shield.
PART NUMBER PART NAME CLASS
E7PZ-12A650-EA EEC IV Processor B
E7PZ-12A650-FA EEC IV Processor B
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION: 881415A
TIME: 1.1 Hrs. - Includes quick test and re-test
DLR. CODING: Basic Part No. DRIVE
Condition Code: 53
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.