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sounds to me like your coolant temp sensor could be going bad . i have been turning wrenches for almost 20 years and also work at autozone . the coolant temp sensor tells the computer that your truck is always cold causing it to go into a "flood " mode trying to crank the truck up . when the engine is warm all the other sensors are telling the computer it is warm but the cts keeps telling it it is cold causing it to pour more fuel . can also cause very crappy fuel mileage .
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