having an issue with truck while at idle. If I turn truck on it sounds good and runs fine then it starts loping, once hit the gas it will stop then will do it again if I'm not driving. If I pull in parking lot after driving and it's warm, she starts up again loping. Any ideas? Truck is not chipped, has 62mm turbo and 150 inj. And 4 inch straight pipe. Thank you
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