| Hello all. I'm having a problem with a misfire on the passenger side and need some help locating it. I can hear it at the back of the car as a putt, putt, putt from the passenger side exhaust. The driver side comes out real smooth. Today, I installed an Ash-ECU and could totally tell the horsepower difference but it was interrupted due to the hesitation. The misfire was definitely before the Ash-ECU install so it's not a new thing. Pretty much the Ash-ECU is working perfectly but the hesitation is robbing me of horsepower and I'm sure a bunch of other things. I went to Advance Auto to see if they could check it with their computer thing they plug in, but they don't have one for my year car. I'm not sure what to do our even where to start. I was thinking of just replacing all spark plugs and coil packs and connectors but I would just like to find out exactly what's wrong. Thank you and I look forward to your all's responses. Ashley G. Wilhelm 91'300ZXTT Stage III
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21:42:58 07/14/11
