Thread: 1988 wont start
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Old 07-31-2018, 09:41 AM   #5
ChevyTech
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Join Date: May 2004
Location: Minnesota
Posts: 4,620
Re: 1988 wont start

The pickup coil connects to the distributor module not to the ECM.

The reference pulse comes from the module.

It is also possible for the distributor module to produce spark without sending a reference pulse to the ECM but this is rare.
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