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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1983STEP VAN P20, 5.7 M, AUTOMATIC, 400/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESPECIFICATIONSE4ME 4-BBL SPECIFICATIONSPECIFICATIONS - ROCHESTER E4ME CARBURETOR4.3L V6, (VIN N) CARBURETOR NO. 17085502
1983 Chevrolet Step Van P20, 5.7 M, Automatic, 400/M40
4.3L V6, (VIN N) Carburetor No. 17085502
1983 Chevrolet Step Van P20, 5.7 M, Automatic, 400/M40SECTION 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° | |||
|
||||
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.