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 Plymouth Laser Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Ignition Coil (2.0L) Test
- Disconnect ignition coil connector. Using an ohmmeter, measure primary coil resistance between ignition coil terminals No. 4 and 2. Also measure resistance between ignition coil connector terminals No. 4 and 1. Perform TEST 1. See Fig 1 . Primary resistance should be .77-.95 ohms at 68°F (20°C).
- With ignition coil connector still disconnected, measure secondary coil resistance. Measure resistance between high voltage terminals for No. 1 and 4 cylinders, and between high voltage terminals for No. 2 and 3 cylinders. Perform TEST 2. See Fig 1 .
- Secondary resistance should be 10,300-13,900 ohms. Replace ignition coil if it does not test as described.
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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