Hey Guys,
I have a couple codes that have been coming up lately as pending codes: P1174 and P1171 (Fuel mixture codes)

I followed all the instructions on how to seafoam and clean out the IM from the sticky, which helped, but didn't solve the issues. This process went well and did help the truck run smoother.

Now though, I still get both the pending codes and the P1174 seems to be coming with enough frequency that it will trigger the CEL within a twenty minute drive or so (while P1171 is still pending).

So where to go from here? She feels like she is still running rough.

I want to clean out the PCV system, but can find out very little about how to do that on here or RAVE. Are they just the hoses that connect to the IM to burn off extra HCs? IS there more to this system than that?

I don't see any obvious vacuum leaks. Any common ones that seem to happen more than not?

Should I clean off my MAF with MAF cleaner? (Makes me nervous from what I have read)

Any other ideas?