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 MANUALSCHEVROLET1985FORWARD CONTROL 6.2 J, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESPECIFICATIONSTBI DESIGN SPECIFICATIONSSPECIFICATIONSTBI-220
1985 Chevrolet Forward Control 6.2 J, Standard
TBI Design Specifications: Specifications: TBI-220
1985 Chevrolet Forward Control 6.2 J, StandardSECTION TBI-220
TBI-220 (1985)
| Application | Specification | |
|---|---|---|
| Throttle Position Sensor (TPS) | .45-.60 volts | |
| Min. Idle Speed (RPM) | N/A | |
| Idle Speed Control | ||
| Low RPM | 500 | |
| High RPM | N/A | |
TBI-220 (1986)
| Application | Specification | ||||
|---|---|---|---|---|---|
| 17086056 | |||||
| Throttle Position Sensor (TPS) | Not adjustable | ||||
| Min. Idle Speed (RPM) | 400-450 In drive. | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17086112, 17086113 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.25 volts | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500 | ||||
| M/T models in Neutral | 775 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17086084, 17086085 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.25 volts | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500 | ||||
| M/T models in Neutral | 775 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17086086 | |||||
| Throttle Position Sensor (TPS) | .42-.54 | ||||
| Min. Idle Speed (RPM) | 675-725 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17086088 | |||||
| Throttle Position Sensor (TPS) | .42-.54 | ||||
| Min. Idle Speed (RPM) | 675-725 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17086090 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
|
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TBI-220 (1987)
| Application | Specification | ||||
|---|---|---|---|---|---|
| 17087004 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17087005 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17087019 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17087021 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17087090 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17087162, 17087163 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
| 17087100, 17087101 | |||||
| Throttle Position Sensor (TPS) | (1) Less than 1.0 volt | ||||
| Min. Idle Speed (RPM) | |||||
| A/T models in Park | 500-550 | ||||
| M/T models in Neutral | 600-650 | ||||
| Idle Speed Control | |||||
| Low RPM | N/A | ||||
| High RPM | N/A | ||||
|
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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.