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 MANUALSCHEVROLET1987SUBURBAN R20, 7.4 N, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESPECIFICATIONSE4ME 4-BBL SPECIFICATIONSPECIFICATIONS - ROCHESTER E4ME CARBURETOR5.0L V8, (VINS F & H)
1987 Chevrolet Suburban R20, 7.4 N, 400/M40
5.0L V8, (VINS F & H)
1987 Chevrolet Suburban R20, 7.4 N, 400/M40SECTION 5.0L V8, (VINS F & H)
ROCHESTER E4ME CARBURETOR SPECS (5.0L VINS "F" & "H")
| Carburetor Number | Specification | ||
|---|---|---|---|
| 17083202 | |||
| TPS | .51 Volts, At Curb Idle With ISC Retracted (On truck (VIN F) .40 volts). | ||
| ISC | |||
| Minimum | 470, In Drive. | ||
| Maximum | 900, In Drive. | ||
| Idle Mixture | Set Rich Stop Screw At 4/32". Set Air Bleed Setting 1.756. | ||
| Lean Screw | 1.304 | ||
| Idle Screw | 3 3/8 | ||
| Vacuum Break | |||
| Primary | 27° | ||
| Secondary | N/A | ||
| 17083203 | |||
| TPS | .51 Volts, At Curb Idle With ISC Retracted (On truck (VIN F) .40 volts). | ||
| ISC | |||
| Minimum | 470, In Drive. | ||
| Maximum | 900, In Drive. | ||
| Idle Mixture | Set Rich Stop Screw At 4/32". Set Air Bleed Setting 1.756. | ||
| Lean Screw | 1.304 | ||
| Idle Screw | 3 3/8 | ||
| Vacuum Break | |||
| Primary | 27° | ||
| Secondary | N/A | ||
| 17083204 | |||
| TPS | .51 Volts, At Curb Idle With ISC Retracted (On truck (VIN F) .40 volts). | ||
| ISC | |||
| Minimum | 470, In Drive. | ||
| Maximum | 900, In Drive. | ||
| Idle Mixture | Set Rich Stop Screw At 4/32". Set Air Bleed Setting 1.756. | ||
| Lean Screw | 1.304 | ||
| Idle Screw | 3 3/8 | ||
| Vacuum Break | |||
| Primary | 27° | ||
| Secondary | N/A | ||
| 17083207 | |||
| TPS | .51 Volts, At Curb Idle With ISC Retracted (On truck (VIN F) .40 volts). | ||
| ISC | |||
| Minimum | 470, In Drive. | ||
| Maximum | 900, In Drive. | ||
| Idle Mixture | Set Rich Stop Screw At 4/32". Set Air Bleed Setting 1.756. | ||
| Lean Screw | 1.304 | ||
| Idle Screw | 3 3/8 | ||
| Vacuum Break | |||
| Primary | 27° | ||
| Secondary | N/A | ||
| 17083216 | |||
| TPS | .51 Volts, At Curb Idle With ISC Retracted (On truck (VIN F) .40 volts). | ||
| ISC | |||
| Minimum | 470, In Drive. | ||
| Maximum | 900, In Drive. | ||
| Idle Mixture | Set Rich Stop Screw At 4/32". Set Air Bleed Setting 1.756. | ||
| Lean Screw | 1.304 | ||
| Idle Screw | 3 3/8 | ||
| Vacuum Break | |||
| Primary | 27° | ||
| Secondary | N/A | ||
| 17083218 | |||
| TPS | .51 Volts, At Curb Idle With ISC Retracted (On truck (VIN F) .40 volts). | ||
| ISC | |||
| Minimum | 470, In Drive. | ||
| Maximum | 900, In Drive. | ||
| Idle Mixture | Set Rich Stop Screw At 4/32". Set Air Bleed Setting 1.756. | ||
| Lean Screw | 1.304 | ||
| Idle Screw | 3 3/8 | ||
| Vacuum Break | |||
| Primary | 17° | ||
| Secondary | N/A | ||
| 17083236 | |||
| TPS | .51 Volts, At Curb Idle With ISC Retracted (On truck (VIN F) .40 volts). | ||
| ISC | |||
| Minimum | 470, In Drive. | ||
| Maximum | 900, In Drive. | ||
| Idle Mixture | Set Rich Stop Screw At 4/32". Set Air Bleed Setting 1.756. | ||
| Lean Screw | 1.304 | ||
| Idle Screw | 3 | ||
| Vacuum Break | |||
| Primary | 27° | ||
| Secondary | N/A | ||
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.