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 MANUALSPONTIAC1987GRAND PRIX BROUGHAM, 5.0 HREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISCARBURETOR - ROCHESTER E4MC/E4MEADJUSTMENTSFLOAT LEVEL (WET SETTING)
1987 Pontiac Grand Prix Brougham, 5.0 H
Float Level (Wet Setting)
1987 Pontiac Grand Prix Brougham, 5.0 HSECTION Float Level (Wet Setting)
NOTE:
This is an on-vehicle adjustment.
- With engine running at idle and choke valve wide open, carefully insert float gauge into vent slot or vent hole (next to air cleaner mounting stud) in air horn. Allow gauge to float freely. See Fig 1
.NOTE: Pressing down on float gauge could result in float damage or carburetor flooding.
RENDER: 1.0x
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.