battery connected ignition on check gauges staying on & motor runs rough on 1994 Chevrolet Cavalier

i have been rebuilding this car and am wondering if I have messed up the computer some how......When the batter is connected and the ignition switch is on, the check gauges are staying on and the motor is running very rough

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1 answer
What's wrong with the gauge, not working. Probably nothing to do with the running of the engine.