1995 t-100 3400 starts idles fine won't rev after 1100 rpm it start popping back

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it starts fine idles fine , step on the gas it's starts backfiring ,popping ,let off throttle , idles fine I've replaced everything you can think of . Replaced throttle control/injectors/all wires/voltage packs/mass air flow/ It only has 86000 original miles . body is perfect no rust,had to toyota dealer they were useless.$ 400 to bring it there 120.00 to the dealer they did nothing . They have no mechanic older than 22 year old . Weren't born when the truck was built. I've sent thousands trying to fix problem. I'm serious . I'm 70 ,fuel flow is good/compression is good