The 1987 to 1990 Distributer Manual provides comprehensive technical specifications, installation procedures, maintenance guidelines, and troubleshooting information for automotive distributors used in various vehicle models during this period. This manual covers mechanical and electronic ignition systems, timing adjustments, rotor and cap replacement procedures, and distributor drive mechanisms for engines produced between 1987 and 1990.
The 1987-1990 distributor systems represent the transition from traditional mechanical distributors to early electronic ignition systems. This manual covers both types, including points-style distributors and electronic ignition distributors with magnetic pickup assemblies.
| Component | Description |
|---|---|
| Distributor Housing | Aluminum or cast iron housing containing drive mechanism |
| Rotor | Distributes high voltage to spark plug wires |
| Cap | Insulated cover with terminals for spark plug wires |
| Points (mechanical) | Contact points for ignition timing |
| Magnetic Pickup (electronic) | Electronic trigger for ignition timing |
| Vacuum Advance | Adjusts timing based on engine vacuum |
| Centrifugal Advance | Adjusts timing based on engine RPM |
| Drive Gear | Meshes with camshaft for rotation |
| Bushing/Bearing | Supports distributor shaft rotation |
| Ignition Module | Controls spark timing (electronic systems) |
Proper installation ensures optimal performance and longevity of the distributor system.
WARNING! Always disconnect battery before installation to prevent electrical shock or accidental engine starting.
Regular maintenance ensures reliable ignition system performance.
| Component | Inspection Interval | Replacement Interval |
|---|---|---|
| Distributor Cap | Every 12,000 miles | Every 30,000 miles |
| Rotor | Every 12,000 miles | Every 30,000 miles |
| Points (mechanical) | Every 5,000 miles | Every 10,000-15,000 miles |
| Ignition Wires | Every 15,000 miles | Every 30,000-45,000 miles |
| Vacuum Advance | Every 15,000 miles | As needed |
| Shaft Bushings | Every 30,000 miles | Every 60,000 miles or as needed |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine misfire | Worn points, cracked cap, bad rotor | Inspect and replace damaged components |
| No start condition | Failed pickup coil, broken drive gear | Test electrical components, inspect mechanical parts |
| Poor performance | Incorrect timing, weak advance mechanisms | Reset timing, test advance operation |
| Excessive wear | Lack of lubrication, misalignment | Lubricate shaft, check gear alignment |
| Electrical arcing | Cracked cap, carbon tracking, moisture | Replace cap, clean components, ensure dry conditions |
Understanding distributor components is essential for proper maintenance and repair.
Correct ignition timing is critical for engine performance and efficiency.
CAUTION! Always follow manufacturer's timing specifications exactly to prevent engine damage.
Proper electrical connections ensure reliable ignition system operation.
| Connection | Wire Color | Function |
|---|---|---|
| Coil Positive | Red or Pink | 12V ignition supply |
| Coil Negative | Black or White | Points/trigger connection |
| Pickup Coil | Orange and Purple | Magnetic trigger signals |
| Ground | Black | Electrical ground |
| Tachometer | Green or Brown | Tachometer signal output |
Always follow safety procedures when working with ignition systems.
WARNING! Ignition systems produce lethal voltages. Exercise extreme caution when testing live circuits.
Distributors manufactured between 1987-1990 were typically covered by 12-month/12,000-mile warranties from original purchase date. Warranty claims must include original purchase receipt and be processed through authorized dealerships or parts distributors.
For technical assistance or replacement parts for 1987-1990 distributor systems: