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 MANUALSJAGUAR1991XJ-6 L6-4.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSAPPLICATION AND IDEMISSION SYSTEM APPLICATION CHART
1991 Jaguar XJ-6 L6-4.0L
Emission System Application Chart
1991 Jaguar XJ-6 L6-4.0LSECTION Emission System Application Chart
DISPLACEMENT 4.0L (3980cc, 243cid)
FUEL CONTROL SYSTEM Lucas Multi-Point Fuel Injection
EMISSION CONTROL DEVICES AND SYSTEMS:
AIS Air Injection System
CAT Three-Way Catalytic Converter
CEC Computerized Engine Controls
EFI Electronic Fuel Injection
EGR Exhaust Gas Recirculation
EVAP Evaporative Emission Control
FR Fill Pipe Restrictor
OXY (Heated) Exhaust Gas Oxygen Sensor
MIL Malfunction Indicator Light
PCV Positive Crankcase Ventilation
SPK Spark Controls
EMISSION CONTROL SYSTEM (ECS) CONFIGURATION LABEL
An ECS Configuration Label is attached to hood.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.