1981 Grand Prix lj v6 no start

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MrSony

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Nov 15, 2014
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It's giving me a code 12
12 is the diagnostic mode code. Does it just flash 12 over and over, or does it do it 3 times then another code?
 
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95Rolla

Not-quite-so-new-guy
Jan 12, 2020
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12 is the diagnostic mode code. Does it just flash 12 over and over, or does it do it 3 times then another code?
Over and over 12 that's it. I sat there for a while trying to see if it would flash anything else
 

MrSony

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Nov 15, 2014
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Then the computer sees nothing wrong, as rudimentary as the ccc system is.
 
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84GP455

G-Body Guru
Jun 19, 2007
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Methuen Ma.
Have you checked the ignition module? It is located under the distributor cap. I had a 3.8 get weak spark one time and it wouldn’t run. Changed the module and it fired right off.
I bet it is the ignition module also. It doesn't take much to fry that thing.
 
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MrSony

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Nov 15, 2014
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Des Moines, Iowa
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