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only the code 12 flashes

Old November 7th, 2018, 2:12 PM
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Default only the code 12 flashes

1993 chevy blazer s10, runs rough, changed distrib, ignition pack,plugs and wires. Even the ECM computer module, still runs terrrible. Stuttering and undrivable.
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Old November 7th, 2018, 2:50 PM
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Old November 7th, 2018, 3:25 PM
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I was thinking code 12 is there with key on not running. How about the fuel filter, pump ect.?
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