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exhaust manifold
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  1. CTS First Generation Forum - 2003-2007
    O2 sensors have welding beads on metal to metal contact, already was told the exhaust manifold gasket and all 3 o2 sensors need to be changed. Now it won't start at all, key is locked in the ignition, won't hold electrical power for crap, sounds like there's now a camshaft knock or something, I...
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