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1993 GMC 3500 Pickup Support Question

1993 GMC 3500 Pickup Support Question

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Question posted by Bubbalilmanredtail on December 30th, 2010

O2 Sensor...

Every i plug the tub running from the intake to the senser. the truck die's and whe the tub is pluged and not in the senser it run's ok but not like how a bb 454 should run..  NEED HELP PLEASE.. O and another wierd thing is.. I timed it to where it should be (4 over) and unpluged the advance time and it runs like crap... So its now set at 16 over.. Wierd...

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Answer #1: Posted by myclique2006 on January 9th, 2011 9:46 PM
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myclique2006

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You timed it wrong. You have to make sure the key is off,unplug the timing wire,then start and set the timing,and shut the truck off.reattach the timing wire.turn the key to on position,but do not start it,clear all codes,turn key off,turn key on and start engine.try that.

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