| Only in 3rd gear? Is it an Auto or Manual? I used to have bad hesitation as well. I found out that the problem was the Spark Plugs, Fuel Filter, Corrosion on the injector connectors, TB butterfly stop screw, and CAS. Once I had adjusted all of those, it quit hesitating. Check the basic stuff, for instance. Do you have the correct NGK plugs? Is your ignition timing correct? Is your TPS correct? Have you replaced the fuel filter at all? etc... This can help you on what to do and look for. [ http://www.twinturbo.net/nissan/300zx/FAQ/FAQpages/hesitate2.html ] Good Luck
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