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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.I would start first with installing a fuel pressure gauge and monitoring the fuel pressure while the problem is occurring. Normal pressure need to be right at 43 to 45 PSI. Anything less then 43 would indicate you either have a restricted filter or a failing fuel pump. Check and post back with the results and we can work from there.