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Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.If you are sure the timing is correct and you have good fuel pressure and its holding steady while accelerating then I would start with checking the exhaust back pressure to be sure there are no restrictions which could cause a lack of power. Also scan the computer and see if there are any stored fault codes, check these things and post back with the results and we can work from there.