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Thread: 03 4.8 Heavy missfire on Bank 2 HELP???

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  1. 11-26-2009 06:02 PM #1
    classic_speed_and_customs
    classic_speed_and_customs is offline Junior Member
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    03 4.8 Heavy missfire on Bank 2 HELP???

    I start my truck and it will run great for a minute or so. Then the whole right bank starts to misfire. Manifold will barely evaporate water. Will ocassionally pick back up around 4000 rpms but die off again instantly. Coils are good and getting power. Changed ECM, MAF, wires, plugs, and checked intake for cracks. Kind of out of ideas. This started when I hit a puddle with the right front tire. Instantly started to miss. Thought I found why when I found my Bank 2 Sensor 1 o2 unplugged but this seemed to have no effect. Any ideas?
    Last edited by classic_speed_and_customs; 11-26-2009 at 06:04 PM.
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