the codes are 522
522
stick so that is normal
173
179
327
542

truck is a 92 f150 4.9 straight six. i cleaned out the egr. i was going to replace the 02 sensor. any ides before i just go and throw money at it.
truck is running very rich. it has always ran great untill recently. terrible mpg super rich smell, i had a vacume leak before fixed that put in new plugs now it is back. any ideas?

 

173/179 are telling the same thing.
You either still have a vacuum leak, a fuel regulator that has gone bad or leaking injectors. Check fuel pressure and for gas coming out of the regulator thru the vacuum line to the manifold.
327 is an EGR control circuit failure.
522 is fuel pump monitor circuit failure.

Work on the fuel problem first then the EGR.
The last one won't cause a problem unless you think the pump ciruit is in trouble.
The fuel pump runs or the engine would not run at all.
Good luck.