hesitation posted by plenum on January 17, 2016 at 01:55 AM
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Fuel filter Spark plug gap (make sure you are running proper NGK plugs) O2 sensors (perform heated o2 sensor test) Corrosion - clean every stinkin connector you can, I'm sure they are all corroded Check/set your base idle Check/set tps Clean throttle bodies Etc etc there is plenty more that can cause a z to hesitate...