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04-25-2005, 08:06 AM
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Is Your Optispark Failing ?
Is Your Opti-Spark Failing?
LT1 owners have dealt with the Opti-Spark distributor for 11 years now, but there is still much confusion regarding the causes and symptoms of a failing unit. Tapping into the PCM with a scan tool is a good way to start, but sometimes no codes will be set. Before diving into the Opti-Spark, be sure to verify that your grounds are good and the coil and wires are not the source of the problem, as they are much easier to change. Symptoms: * Car suddenly dies and won't restart * Starts but immediately dies * Extended cranking to start * Rough idle * Sputtering * Backfiring * Trouble reaching higher rpm * Black smoke from exhaust * Poor performance with car warmed up * Weak plug wire spark * Codes 16, 36, and 42 may be set Originally Posted by: MoffZ28
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