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.
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HOMESERVICE MANUALSFORD1991AEROSTAR 2WD V6-183 3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESSTALLS AT IDLE, DECELERATION
1991 Ford Aerostar 2WD V6-183 3.0L
Stalls at Idle, Deceleration
1991 Ford Aerostar 2WD V6-183 3.0LSECTION Stalls at Idle, Deceleration
Engine stalls at stops and on deceleration.
POSSIBLE CAUSE ACTION
EGR valve loose or sticking 1. Check the EGR system under TESTING
plunger, flange gasket leaking, PROCEDURES. If OK, step 2
solenoid and thermo valves 2. Check the EGR electronic controls.
malfunctioning Refer to COMPUTERIZED ENGINE CONTROLS.
Ignition timing Check the Ignition Timing under
ADJUSTMENT PROCEDURES.
Restricted exhaust system Check the Catalytic Converter under
TESTING PROCEDURES.
Idle speed too low 1. Check and adjust the idle speed under
ADJUSTMENT PROCEDURES.
2. Check the operation of all idle speed
control devices
Vacuum leak 1. Inspect vacuum hoses for proper
routing and damage.
2. Check the intake manifold area
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.