Avenger L4-2.0L DOHC (1995)
Ignition Cable: Component Tests and General Diagnostics
Spark Plug Cable Resistance Check
1. Remove the spark plug cable, attach an ohmmeter lead to each end, and measure the resistance of the cable.
Limit: max. 8 K-Ohms
2. Replace any cable not within tolerance.
Testing For Open Circuits, High Resistance and Loose Terminals
Use an ohmmeter to check cables for opens, loose terminals or high resistance as follows:
1. Remove cable from spark plug.
2. Remove cable from the coil tower.
3. Connect the ohmmeter between the spark plug end terminal and the coil end terminal.
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Make sure ohmmeter probes are in good contact.
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Resistance should be within tolerance shown in the cable resistance chart.
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If resistance is not within tolerance, replace cable assembly. Test all spark plug cables in the same manner.
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If no problems are found, SEE Ignition System/System Diagnosis/Testing For Spark At Coil.
SECONDARY IGNITION CABLE RESISTANCE
Minimum
Maximum
250 Ohms per Inch
1,000 Ohms per Inch
3,000 Ohms per Foot
12,000 Ohms per Foot
Testing For Punctures and Cracks
When testing cables for punctures and cracks with an oscilloscope and an inductive voltage probe, follow the instructions of the equipment
manufacturers.
CAUTION: Do not leave any one spark plug cable disconnected for more than 30 seconds during test or possible heat damage to catalytic
converter will occur.
If an oscilloscope and inductive probe are not available, cables can be tested as follows:
1. With the engine not running, connect one end of a test probe (i.e. a piece of wire with insulated alligator clips on each end) to a good ground, other
end free for probing.
WARNING: The ignition system generates approximately 40,000 volts. Personal injury could result from contact with this system.
2. With the engine running, move test probe along entire length of all cables (approximately 0 to 1/8 inch gap).
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If punctures or cracks are present there will be a noticeable spark jump from the faulty area to the probe.
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Replace cracked, leaking or faulty cables.