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98 Yukon 5.7 with zz4 cam problems
Just did an engine swap with new 350 and new vortec heads on my 98 Yukon 5.7, my uncle gave me a ZZ4 cam shaft he wasn't using. We re-used the intake tighten the rockers a half turn past no lash. The truck will idle down upon starting but then will rise right after and the truck surges when in...- Yukon-on35s
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- Forum: Engine & Drivetrain
