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 MANUALSGMC1986VALUE VAN P3500, 7.4 W, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESPECIFICATIONSE4ME 4-BBL SPECIFICATIONSPECIFICATIONS - ROCHESTER E4ME CARBURETOR4.3L V6, (VIN N) CARBURETOR NO. 17085502
1986 GMC Value Van P3500, 7.4 W, Standard
4.3L V6, (VIN N) Carburetor No. 17085502
1986 GMC Value Van P3500, 7.4 W, StandardSECTION 4.3L V6, (VIN N) Carburetor No. 17085502
4.3L V6, (VIN N) CARBURETOR NO. 17085502
| Application | Specification | |||
|---|---|---|---|---|
| TPS | .25 Volts, At Curb Idle With ISC Retracted. | |||
| ISC | ||||
| Min. | ISC Not Used. | |||
| Max. | ISC Not Used. | |||
| Idle Mixture (1) | ||||
| Lean Screw | 1.304 | |||
| Idle Screw | 3 | |||
| Vacuum Break | ||||
| Primary | 27° | |||
| Secondary | 36° | |||
|
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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.