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Passenger side miss fire need help

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Old Jan 14, 2020 | 11:39 AM
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Default Passenger side miss fire need help

OK so truck is a 2008 Silverado 5.3l. Head gasket went and then was drove abit but not long and after that sat for a couple months before sitting at a buddies house to get rockers done. It ended up siting for about 6months and nothing got done so was brought home and sat in barn for another year. New engine installed But now seems to be running on driver side of engine intermittently and will then run on both sides. Have checked to make sure wires from ecu to coil plug have continuity have swapped coil packs around, has new plugs, wires, air filter, and fuel pump and fuel. Pretty much at a lost for what to do at this point. Any advice to help solve this issue would be great.
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Old Jan 14, 2020 | 11:57 AM
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Is the check engine light on? If so what codes does it show? Could help to narrow it down.
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Old Jan 14, 2020 | 12:07 PM
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Beleave only p0300 it's been abit since last actually got to drive it. Seemed to be would start running like a bag of crap clear codes and would drive fine for abit. Its cousins truck so just trying to solve this night mate of a engine install it ran fine until head gasket went
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Old Jan 16, 2020 | 07:31 PM
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Try the tune/diagnostics forum??
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