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 MANUALSCHEVROLET1989CAPRICE BASE, 4.3 Z, 700R4/MD8REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMCATALYTIC CONVERTERSPECIFICATIONS
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8
Catalytic Converter: Specifications
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8SECTION Specifications
EXHAUST SYSTEM BACKPRESSURE SPECIFICATIONS
| Engine (VIN) | psi (kg/cm2 ) | RPM |
|---|---|---|
| 2.0L (1 & K) TBI | 1.25 (.09) | Idle |
| 2.0L (1 & K) TBI | 3.0 (.2) | 2000 |
| 2.0L (M) MFI Turbo | 1.25 (.09) | Idle |
| 2.0L (M) MFI Turbo | 3.0 (.2) | 3000 |
| 2.3L (D) MFI (DOHC) | .5 (.04) | Idle |
| 2.3L (D) MFI (DOHC) | .75 (.05) | 3000 |
| 2.5L (R & U) TBI | 1.25 (.09) | Idle |
| 2.5L (R & U) TBI | 3.0 (.2) | 2000 |
| 2.8L (W) MFI | 1.25 (.09) | Idle |
| 2.8L (W) MFI | 3.0 (.2) | 2000 |
| 3.1L (T) MPFI | 1.25 (.09) | Idle |
| 3.1L (T) MPFI | 3.0 (.2) | 2000 |
| 3.3L (N) MPFI | 1.25 (.09) | 2500 |
| 3.8L (C) SFI | 1.25 (.09) | 2500 |
| 5.0L (E) TBI | 1.25 (.09) | 2000 |
| 5.0L (Y) 4-Bbl. | 1.25 (.09) | 2500 |
| 5.7L (7 & 8) TBI | 1.25 (.09) | Idle |
| 5.7L (7 & 8) TBI | 3.0 (.2) | 2000 |
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.