Already searched GOOGLE and other forums with no luck.
P0102 MAF circuit (low input)
P0113 IAT sensor circuit
malf. (high input)
P0171 System too lean (Bank 1)
Gas cap is tight
MAF replaced (ran fine for 2 days then codes returned)
Visual inspection of vaccum/intake lines (top side)
Is there any vaccum lines on the underside for me to check? I've already done a quick inspection up top and not found anything, the codes all suggest an air issue but I can't seem to find any leaks. Any common areas that I should check. Thanks in advance.