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 MANUALSCHEVROLET1998ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDISTRIBUTORTESTING AND INSPECTION
1998 Chevrolet Astro Van 2WD V6-4.3L VIN W
Distributor: Testing and Inspection
1998 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Testing and Inspection
NOTE: Discoloration of the cap and some whitish build up around the cap terminals is normal. Yellowing of the rotor cap, darkening and some carbon build-up under the rotor segment is normal. Replacement of the cap and rotor is not necessary unless there is a driveability concern.
INSPECT
1. Cap for cracks, tiny holes or carbon tracks between cap terminal traces. Carbon tracks can be diagnosed by using an ohmmeter. With the cap removed, place one base ohmmeter lead on a cap terminal. Use the other lead to probe all other terminals and the center carbon ball. Move the base lead to the next terminal and probe all other leads. Continue until all secondary terminals have been tested. If there are any non-infinite readings, replace the cap.
2. Cap for excessive build up of corrosion on the terminals. Scrape them clean or replace the cap. Some build up is normal.
3. Rotor segment. Replace the rotor if there is excessive wear on the rotor segment or the plastic under the segment or staked post is melted. Some looseness of the rotor segment is normal if it does not cause performance problems.
4. Shaft for shaft-to-bushing looseness. If the shaft wobbles, replace the housing assembly.
5. Housing for cracks or damage.
INSPECT
1. Cap for cracks, tiny holes or carbon tracks between cap terminal traces. Carbon tracks can be diagnosed by using an ohmmeter. With the cap removed, place one base ohmmeter lead on a cap terminal. Use the other lead to probe all other terminals and the center carbon ball. Move the base lead to the next terminal and probe all other leads. Continue until all secondary terminals have been tested. If there are any non-infinite readings, replace the cap.
2. Cap for excessive build up of corrosion on the terminals. Scrape them clean or replace the cap. Some build up is normal.
3. Rotor segment. Replace the rotor if there is excessive wear on the rotor segment or the plastic under the segment or staked post is melted. Some looseness of the rotor segment is normal if it does not cause performance problems.
4. Shaft for shaft-to-bushing looseness. If the shaft wobbles, replace the housing assembly.
5. Housing for cracks or damage.
RENDER: 1.0x
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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.