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 PERFORMANCESPECIFICATIONSSCAN TESTER SPECIFICATIONS - CARBURETORSCAN TESTER SPECIFICATIONSFULL FUNCTION CARBURETOR - SCAN DATA SPECIFICATIONS
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8
Full Function Carburetor - Scan Data Specifications
1989 Chevrolet Caprice Base, 4.3 Z, 700R4/MD8SECTION Full Function Carburetor - Scan Data Specifications
NOTE:
Information contained in the following table is typical of readings taken on vehicle with engine idling, upper radiator hose hot, closed throttle, transmission in Park or Neutral, "closed loop" status achieved and all accessories off (except as noted in tables). Data parameters are updated every 1 1/4 seconds. On systems using P-4 computers, parameter updates are virtually instantaneous. Not all devices & systems are used on all models.
FULL FUNCTION CARBURETED
| Tester Position | Units Measured | Nominal Data Value |
|---|---|---|
| A/C Request | Yes/No | No/Yes (with request) |
| AIR Divert Sol. | On/Off | On (air to switching sol.) |
| AIR Divert Sol. | On/Off | Off (air to atmosphere). |
| AIR Switching Sol. | On/Off | On (to exhaust manifold). |
| AIR Switching Sol. | On/Off | Off (to catalytic converter). |
| BARO | Volts | 3-4.5. |
| Battery Voltage | Volts | 13.5-14.5. |
| Canister Purge Sol. | On/Off | On engine cold (some at idle). |
| Coolant Temp. | °C | 85-105° (norm. temp.). |
| Cross Counts | Counts | 0-255. |
| EGR Solenoid | On/Off | On when energized. |
| EGR Duty Cycle | 0-100% | 0/closed-100/fully open. |
| ILC Solenoid | On/Off | On extended/Off retracted. |
| Knock Retard (ESC) | Counts | 0-255. |
| M/C Dwell | Degrees | 10-50° varying. |
| O2 Sensor | Millivolts | 100 (lean) to 999 (rich). |
| Open/Closed Loop Status | Ol/Cl | Closed/Open during extended idle. |
| Pressure Sensor | Volts | 3.0-4.5 (idle), 0-1 (WOT). |
| P/N Switch | P/N/RDL | Park/Neutral. |
| PROM I.D. | PROM # | Original factory number. |
| RPM | RPM | Spec. +/-25 RPM Drive (auto.). |
| RPM | RPM | Spec. +/-50 RPM Neut. (man.). |
| TCC | On/Off | Off (On with command). |
| TPS | Volts | .5 (closed) to 5.0 (WOT). |
| Trouble Codes | Code # | No codes. |
| VSS or MPH | MPH | 0-actual. |
NOTE:
Condensed, general SYMPTOM DIAGNOSIS and INTERMITTENTS articles are located in TROUBLE SHOOTING section, if necessary. See TROUBLE SHOOTING - BASIC PROCEDURES
article in the GENERAL INFORMATION section.
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.