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Sorry to drag up this old post, but did this ever solve the problem you were having?



Yes i did. It turned out to be a combination of 2 things, Bosch platinum plugs gapped to 0.045" and the ecu. I bought a chrome box from the steelership, and that solved the problem. The plugs didn't help and i changed out to champions RJ12YC gapped at 0.035" and then it started pulling really hard right to 5500rpm's, then shift, and YEEHAA!!! the plugs weren't causing the miss, it was the ecu that was the problem. Funny how 2 napa boxes and 1 orange dealer box all did the same thing....but the chrome box from the dealer is perfect, the car even starts better....

good luck...