My car keeps going rich after i drive around. The car will sit and ideal fine. AF is around 16 or so at ideal. Once i go drive around it will stay around 13.5 to 13. I have read it could be a boost leak. I have checked and have checked everything, and it all seems to be fine. Not sure if i missed something or something is going out. I swapped out turbos with an 02 dump . I figured if anything the car would lean out not get richer. Anything i should check before i get a tune i hope next week?
What are signs that an O2 is going bad?

 

Boost/vaccum leak.

 

When you say you "checked" for a boost leak, did you do a visual inspection or an actual pressure test?


Could be a bad O2 sensor, could be from changing turbo's (9.8 vs 10.5 hot side). You could also have an exhaust leak that occurred while installing the new turbo.

 

Yea i just looked at all the lines. Didnt Pressure test. I went from a evo 8 Turbo to a Map ef2. Would it throw a code for a bad 02?

 

Dude.... That turbo caused drastic changes to the tune. Do an ACTUAL pressurized boost leak test, then go get the car tuned. I would throw that turbo in the trash though. It's just going to fail, or wildly underperform anyways.

 

Agreed^

FWIW: I had a MAP turbo that blew in half. I sent it in for a rebuild, but it died while tuning. When I contacted MAP, for a third time, they informed me they are no longer selling nor servicing those turbos.
If it blows up, it could cause other damage, so please beware. Some of the older ones seem to still be going, but it's a crap shoot.

 

noted using it for a few months till i hope go FF

 

Blew In Half? What happen what Damage did you have ?

 

The comp wheel and turbine decided to get a divorce.