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 MANUALSMAZDA1991PROTEGE L4-1839CC 1.8L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSPECIFICATIONSMECHANICAL SPECIFICATIONS
1991 Mazda Protege L4-1839cc 1.8L SOHC
Mechanical Specifications
1991 Mazda Protege L4-1839cc 1.8L SOHCSECTION Mechanical Specifications
ENGINE DISPLACEMENT 112.2 cid (1839 cc)
FIRING ORDER 1 - 3 - 4 - 2
FUEL INJECTOR
Torque value 14 - 19 ftlb (19 - 25 Nm)
OXYGEN SENSOR
Torque value 22 - 36 ftlb (29 - 49 Nm)
THROTTLE SENSOR
Torque value 14 - 21 inlb (1.6 - 2.4 Nm)
WATER THERMOSENSOR
Torque value 18 - 22 ftlb (25 - 29 Nm)
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.