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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1990SUNDANCE BASE, 2D HATCHBACK, 2.5 J, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTINGTESTING SPARK AT COIL 3.3L
1990 Plymouth Sundance Base, 2D Hatchback, 2.5 J, Automatic
Testing Spark At Coil 3.3L
1990 Plymouth Sundance Base, 2D Hatchback, 2.5 J, AutomaticSECTION Testing Spark At Coil 3.3L
- This system has 3 independent coils. These coils must be tested separately. Remove spark plug wire from No. 2 spark plug. Insert a clean screwdriver into spark plug boot.
- Hold screwdriver approximately 1/4" from ground. Crank engine and watch for spark between screwdriver and ground. Repeat this test for No. 4 and 6 spark plug wires.
- If no spark was present on any cylinder tested, go to FAILURE TO START TEST. If one or more cylinders has weak or no spark, go to next step.
- Remove spark plug wires one at a time. Using an ohmmeter, measure resistance of each spark plug wire. Resistance should be 3000-12,000 ohms per foot. Replace spark plug wire(s) not within specification.
- Measure resistance on primary side of each coil. Resistance should be .5-.7 ohm. Measure resistance between B+ terminal of ignition coil connector and corresponding cylinders. See Fig 1 . Replace coil if resistance is not within specification.
- Remove spark plug wires from coil one at a time. Measure secondary resistance of ignition coil between grouped cylinders and coil towers. Resistance should be 7000-14,000 ohms. Replace coil if resistance is not within specification.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.