86 oldscalis 2.5 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-27-2014, 07:54 PM   #1
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Default 86 oldscalis 2.5

distributor & coil on 2.5 4 cyl.engine - no spark!! What / how to test ? I have no spark @ plugs. What powers the distributor?cranks fine - has been running before.
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Old 12-27-2014, 11:00 PM   #2
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This is basic HEI with an External coil?

So, no spark out of the external coil wire? ...... Have you tested the external coil? Attach a spark tester to the coil wire, and ground the primary coil for a few seconds....then break the ground, you should get a spark out of the coil....if no, bad coil.....

If yes, possibilities are bad ignition module, bad pickup coil, bad wiring/connections, or no power or ground.....
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