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 MANUALSCHEVROLET1992LUMINA APV V6-3800 3.8LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSFILLPIPE RESTRICTORTESTING AND INSPECTION
1992 Chevrolet Lumina APV V6-3800 3.8L
Fillpipe Restrictor: Testing and Inspection
1992 Chevrolet Lumina APV V6-3800 3.8LSECTION Testing and Inspection
The fillpipe restrictor opening must be large enough to to accept any unleaded gas pump nozzle, but small enough to prevent use of leaded gasoline pump nozzles.
Special tools are available to check the size of the fillpipe restrictor, or a simple tool can be made to the dimensions shown in the illustration. Suggested material is non-sparking 1552 alloy.
1. Attempt to insert small end of dowel into fillpipe restrictor. If the small end does not enter the restrictor, the fillpipe restrictor passes the functional test.
Tool For Checking Fillpipe Restrictor:
Special tools are available to check the size of the fillpipe restrictor, or a simple tool can be made to the dimensions shown in the illustration. Suggested material is non-sparking 1552 alloy.
1. Attempt to insert small end of dowel into fillpipe restrictor. If the small end does not enter the restrictor, the fillpipe restrictor passes the functional test.
RENDER: 1.0x
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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.