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.
1990 Isuzu Impulse AutomaticFACTORY OEM SERVICE PROCEDURE
Reassembly (2.3L)
- Attach advance springs to distributor shaft spring hanger pin. Ensure smaller tapered ends of spring (both ends) are secured to lower side of hook.
- Align rotor shaft notches with distributor shaft notches. Install pinion gear and washers. Insert roll pin. Stake both sides of roll pin. Align scribe marks on breaker plate and distributor housing.
- Install reluctor. Ensure reluctor roll pin notch and reluctor notch are parallel when roll pin is inserted into reluctor. Install vacuum advance unit. Apply vacuum to advance unit and ensure vacuum advance moves.
Factory Service Tools
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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.
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