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 MANUALSCHEVROLET1985STEP VAN P20, 4.8 T, AUTOMATIC, 475/M40REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESPECIFICATIONSTBI DESIGN SPECIFICATIONSSPECIFICATIONSTBI-200
1985 Chevrolet Step Van P20, 4.8 T, Automatic, 475/M40
TBI Design Specifications: Specifications: TBI-200
1985 Chevrolet Step Van P20, 4.8 T, Automatic, 475/M40SECTION TBI-200
TBI-200 (1981-83)
| Application | Specification | ||
|---|---|---|---|
| 17081030 | |||
| Throttle Position Sensor (TPS) | .5-.6 volts | ||
| Min. Idle Speed (RPM) | N/A | ||
| Idle Speed Control | |||
| Low RPM | 400 | ||
| High RPM | 2000 | ||
TBI-200 (1984)
| Application | Specification | ||
|---|---|---|---|
| 17081030 | |||
| Throttle Position Sensor (TPS) | .45-.55 volts | ||
| Min. Idle Speed (RPM) | N/A | ||
| Idle Speed Control | |||
| Low RPM | 375 | ||
| High RPM | 2000 | ||
| 17081031, 17081032 | |||
| Throttle Position Sensor (TPS) | .5-.6 volts | ||
| Min. Idle Speed (RPM) | N/A | ||
| Idle Speed Control | |||
| Low RPM | 400 | ||
| High RPM | 2000 | ||
| 17082030, 17082031 | |||
| Throttle Position Sensor (TPS) | .45-.55 volts | ||
| Min. Idle Speed (RPM) | N/A | ||
| Idle Speed Control | |||
| Low RPM | 450 | ||
| High RPM | N/A | ||
| 17084034, 17084036, 17084035 | |||
| Throttle Position Sensor (TPS) | .45-.55 volts | ||
| Min. Idle Speed (RPM) | N/A | ||
| Idle Speed Control | |||
| Low RPM | 450 | ||
| High RPM | N/A | ||
TBI-200 (1985)
| Application | Specification | ||
|---|---|---|---|
| 17085056 | |||
| Throttle Position Sensor (TPS) | .45-.60 volts | ||
| Min. Idle Speed (RPM) | 550 In drive. | ||
| Idle Speed Control | |||
| Low RPM | N/A | ||
| High RPM | N/A | ||
TBI-200 (1985-87)
| Application | Specification | |
|---|---|---|
| Throttle Position Sensor (TPS) | .43-.53 volts | |
| Min. Idle Speed (RPM) | N/A | |
| Idle Speed Control | ||
| Low RPM | 450 | |
| High RPM | N/A | |
TBI-200 (1987)
| Application | Specification | ||
|---|---|---|---|
| 17087030 | |||
| Throttle Position Sensor (TPS) | .45-.55 volts | ||
| Min. Idle Speed (RPM) | 550 In drive. | ||
| Idle Speed Control | |||
| Low RPM | N/A | ||
| High RPM | 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.