Instead of throwing parts at the problem you need to do some investigation as to what is the problem. P2177 and P2179 mean you have a lean off idle condition. A lean condition can be caused by a bad fuel pump, clogged filter or a vacuum leak. I would determine what type of fuel pressure you have at the fuel rail when you turn the key on without starting the engine. You should be in the neighborhood of 45-50 psi. If you have this type of fuel pressure I would look at a vacuum leak, possibly from the pressure regulator to the engine.

Hopefully when you replace parts you buy decent parts and not cheap parts off eBay or Amazon. There's a reason why the parts are cheap, they don't have a QC program so all their parts made are sold, none are rejected

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2006 Infiniti G35
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