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I just bought my first notch and its a 88. Started looking around and found somone ran a grond wire and spliced it onto the black wire of the tps. When I disconected it, the idle shot up to 4k rpm and wont go back down unless the ground wire is conected back to the black tps wire.Also I cant set the Timing. When I pull the jumper on the dist. harness, the Idle doesnt drop and timing goes all over the place. Could it be a bad ECM? Please Help
 
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