95 tbird issues

I have a 95 tbird that recently had some maf sensor trouble where my check engine light was on and my car would randomly lose power while driving, i replaced the maf sensor and rewired the connections right leading to it because they had some corrosion in them. Since then the random power loss has disapeared but my car just doesn't seem to have the power it used to have, especially in the cold. The check engine light has also come on for crankshaft position sensor, egr valve, and dpfe upper hose off since all at seperate times and when i delete them out of the computer they don't come back on. I'm not sure what is the issue with it, any help?

Do a visual Inspection on your vacuum hoses going to the EGR valve, and DPFE.
Clean electrical connectors, and use dielectric grease for protection.