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International Automotive Technicians Network
Re: 1994 GM 4.3 No Spark
Posted to Technical Discussion Forum on 8/7/2017

When you scoped the current to the coil, did the coil have a distinct coil turn on and coil turn off? If not, then the problem is in the primary coil driver.

An ignition coil needs to be properly charged with a quick complete discharge if it is going to prod... Login to read more.