2007 Chevrolet impala ls 3.5l v6
I have the good ol 3.5 and I'm Getting heavy missfire counts from cylinder 5 and 6 and a couple from 1 and 4. I've changed all the injectors and put new plugs on 5 and 6 to see if it fixed the problem.. it didnt. All wires are new. Intake manifold gaskets are new......I'm at a loss here. It doesn't feel like a dead miss.
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