Take it to an AutoZone, ask for a code read (it's free). Post codes here. Pretty sure it's gonna be P0101 and/or P010B, and the likes. I had the same issue, same symptoms, turn off the car, turn back on, and bam, power was back. Cleaned my MAF sensors 4 times, then cleaned my throttle bodies, boom, no more limp mode, and no codes either.
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FI Non-Res Test Pipes | FI 18" Res CBE | Stillen Gen 3 CAI | Dynotuned @ Dynosty EcuTek 325 whp
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