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When i start it up it runs fine then i hit the throttle and it backfires and dies;

Sorry I'm sorry it's been frustrating it's runs fine when you first start it then when it warms up and you hit the gas pedal it back fires and dies i don't know where to put the period it's driving me nuts but when i let it sit for about 5 to ten minutes it starts right back up and it starts...

My Tahoe was running good then it happened it loss power and died i let it sit a few it started again ran good for a while then back fired and died again i changed the 02 on bank 2 didn't help codes multiple misfire but it idles fine until it warms up one code reads converter problems i don't...