B52fighter

Hey guys, anyone get these codes? I know what they are, both banks are running rich, was curious to see what people have done to help get rid of them, my pickups had em for awhile now, and when I had the transmission put in I had the shop try and figure it out while it was there, and ended up replacing the Pcv valve, and fuel filter, said the injectors didn't leak down after pulling one and cycling the key. Any ideas?
Thanks
Brandon

B52fighter

Anyone?

RLXXI

Would help if you posted your year model and engine size.

03f15012

I go to this site to help me out. It gives possible solutions on some of the codes. I would suggest keeping this site bookmarked for later. Here is the one for P0172:

http://www.obd-codes.com/p0172

And here is P0175:

http://www.obd-codes.com/p0175

B52fighter

99' 5.4 sorry forgot that part haha

Warspite

I do know that for the opposite (lean codes), some basic maintenance can clear up the problem, if not a vacuum leak. First, clean the throttle body, Idle Air Controller and MAF sensor with dedicated sprays (don't use carb cleaner). Could also be time for new plugs - or the right ones, if not Motorcraft (yes, our trucks are picky). After doing all of these, disconnect the battery, and let the PCM "relearn." Give these a try.

akdoggie

You have a vacuum leak, causing it to run rich. Fix the leak, you should be good. Grad a good can of carb cleaner and start spraying your vacuum lines and where your manifold attaches. When the engine picks up, you've got your leak.

Good luck.

fordtec

Vacuum leaks make an engine run lean, not rich. Check make sure your air filter is not blocked. Also you could hook up a pressure gauge and make sure the fuel press is not maxed out. The pump regulator can be stuck causing it to put out max pressure all the time, resulting in a rich condition. This would require a new fuel pump as the regulator is internal.