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 MANUALSTOYOTA2004CELICA GT, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 94 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)AIR INDUCTION SYSTEMSACOUSTIC CONTROL INDUCTION SYSTEM (ACIS)AIR CLEANER CAP SUB-ASSEMBLY (ES300)
2004 Toyota Celica GT, Standard
Air Cleaner Cap Sub-Assembly (ES300)
2004 Toyota Celica GT, StandardSECTION Air Cleaner Cap Sub-Assembly (ES300)
WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2003 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
- Cover port "C" with finger and check that air flows from port "B" to port "A". See Fig 1.
- Cover port "C" with finger and check that air does not flow from port "A" to port "B".
- Cover ports "A" and "C" with fingers, apply 18 in. Hg (60 kPa) of vacuum to port "B" and check that there is not change of vacuum after one minute.
- Repair or replace as necessary.
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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.