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.
1994 Lexus GS 300FACTORY OEM SERVICE PROCEDURE
ACIS Vacuum Tank
Disconnect vacuum hoses from vacuum tank. See Fig 1 and Fig 3. Replace vacuum tank if it does not operate as follows.
- Blow through port "B". See Fig 3. Air comes out of port "A".
- Blow through port "A". Air does NOT come out of port "B".
- Plug port "B". At port "A", apply 16 in. Hg. Vacuum holds for at least one minute.
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.