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 StandardFACTORY OEM SERVICE PROCEDURE
Ignition Coil
NOTE:
On Trooper 2.8L, primary and secondary coil resistance is not available. To test ignition coil, refer to appropriate BASIC TESTING
article.
IGNITION COIL RESISTANCE - Ohms @ 68°F (20°C)
| Application (1) | Primary | Secondary | |||
|---|---|---|---|---|---|
| Amigo & Pickup | |||||
| 2.3L | 1.2-1.4 | 8600-13,000 | |||
| 2.6L | .81-.99 | 7500-11,300 | |||
| Impulse | 1.2-1.5 | 10,200-13,800 | |||
| Trooper 2.6L | 0.9 | 9400 | |||
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Factory Service Tools
Use the Manual With the Right Hardware
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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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