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.

1990 Mitsubishi Precis Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Vacuum Advance Distributor Specifications

With engine at operating temperature, disconnect vacuum hose from distributor. Run engine at idle.
Using an advance timing light, check ignition timing. Raise engine speed to specified RPM. Check ignition timing. See DISTRIBUTOR ADVANCE SPECIFICATIONS table.

Connect a vacuum pump to distributor advance unit. With engine running at idle, apply specified vacuum to advance unit. Check ignition timing. See DISTRIBUTOR ADVANCE SPECIFICATIONS table.

DISTRIBUTOR ADVANCE SPECIFICATIONS ⁽¹⁾

Application

Centrifugal Degrees @ RPM

Vacuum Degrees @ In. Hg

Montero (2.6L)

0 @ 1600

⁽²⁾ 0 @ 3.15

Montero 2.6L

9 @ 2800

8 @ 5.91

Montero 2.6L

19 @ 6000

20 @ 14.17

⁽¹⁾	Advance specifications for models not listed are computer controlled.

⁽²⁾	Idle advance on Calif. and High Altitude models is zero degrees @ 2.36 in. Hg and 5 degrees @ 3.15 in. Hg.

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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