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.
Diagnostic Test
- EVAPORATIVE SYSTEM INSPECTION
Turn the ignition off.
Raise the vehicle as necessary in accordance with the Service Information.
Perform a thorough inspection on the evaporative/fuel system. Check for the following conditions:
- Holes or cracks
- Loose seal points
- Evidence of damaged components
- Incorrect routing of hoses or tubes
- Loose or missing fuel filler cap
- Improper installation of the fuel filler cap
- Damaged locking tabs on cap and/or fill tube
- Damaged seal points on cap and/or fill tube
- Fuel cap gasket seal missing or damaged
Were any problems found?
Yes
- Repair as necessary.
- Perform PCM VERIFICATION TEST .
No
- Go to step 2.
- EVAPORATIVE SYSTEM LEAK
To test the evaporative system for leaks you will need Miller Tool #8404A Evaporative Emission Leak Detector (EELD).
WARNING: Keep lit cigarettes, sparks, flames, and other ignition sources away from the test area to prevent the ignition of explosive gases. Keep the test area well ventilated. Failure to follow these instructions can result in personal injury or death.
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.