Ok so I am assuming OP is going into Limp Mode. It was happening to me after I installed the Long Tube Intakes. Small particles or things like bugs can get into your Mass Air Flow Sensors and damage the small filaments inside the air flow sensors. It is recommended that you clean both sensors really good and re-install. Cleaning the throttle bodies is also a great idea. I personally had the same issue as OP and did this and the issue went away. I agree with everyone else commenting the same suggestion.
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