2012 Silverado 4.3L - Loud bang while cranking
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replaced all 6 injectors. put it all back together and when i tried to start it it cranked for about 15 seconds then a loud bang in engine. removed plenum and spider injection, disconnected fuel, cranked it again and same thing. To the best of my knowledge nothing fell into engine. all tools, nuts and bolts accounted for.
Anyone got an idea what's going on?
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