misfire p3000 after catalytic converter replace

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misfire p3000 after catalytic converter replace

10-30-2011, 01:54 AM

HUMTECH

Hummer Authority

Join Date: Sep 2003

Location: Canada

Posts: 1,251

Re: misfire p3000 after catalytic converter replace

Does it seem worse when cold? Could be intake manifold gaskets leaking. they have updated design gaskets for the early year 6.0l

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