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.
1991 Ford Taurus L4-153 2.5L HSCFACTORY OEM SERVICE PROCEDURE
Connector Locations
Engine Compartment View:
A/C CLUTCH CYCLING PRESSURE SWITCH
AIR CHARGE TEMPERATURE SENSOR
CANISTER PURGE SOLENOID
EGR VACUUM REGULATOR (EVR) SOLENOID
ELECTRONIC ENGINE CONTROL MODULE (ECA)
HEATED EXHAUST GAS OXYGEN (HEGO) SENSOR
IDLE SPEED CONTROL
IGNITION COIL
MASS AIR FLOW (MAF) SENSOR
OIL PRESSURE SWITCH
PRESSURE FEEDBACK EGR SENSOR
RADIO NOISE CAPACITOR
TFI IGNITION MODULE
THROTTLE POSITION SENSOR
Engine Compartment View:
AIR BAG REAR SENSOR
AMBIENT TEMPERATURE SENSOR
BRAKE FLUID LEVEL SWITCH
CENTER LINE FORWARD CRASH SENSOR
COOLANT TEMPERATURE SENDER
DAYTIME RUNNING LAMPS (DRL) MODULE
ENGINE COOLANT TEMPERATURE (ECT) SENSOR
FUEL INJECTORS
INTEGRATED RELAY CONTROL MODULE
LEFT FORWARD CRASH SENSOR
RIGHT FORWARD CRASH SENSOR
SPOUT CHECK CONNECTOR
VIP (DIAGNOSTIC) CONNECTORS
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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