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 Lexus LS 400FACTORY OEM SERVICE PROCEDURE

Distributor Sensors

ES250 DISTRIBUTOR PICK-UP COIL AIR GAP ⁽¹⁾

Application

In. (mm)

ES250

.008-016 (.2-.4)

⁽¹⁾	Not adjustable. If incorrect, replace distributor housing.

DISTRIBUTOR SENSOR RESISTANCE

Application		Ohms
ES250
Pick-Up Coils		205-255
LS400
No.1 & No. 2 Cam Sensors		950-1250
Engine Speed Sensor		950-1250

Factory Service Tools

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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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