System Too Rich

[schenk85]

My car has been throwing SES codes for some time now about the system being too rich, the code it P0172 (i believe its bank 1 sensor 1). iv replaced that 02 sensor once a few months ago, and just about a month ago, i had to replace a Catalytic converter (probably because of running too rich)
i also have an air/fuel mixture gauge which typically reads a little over *Rich* on the spectrum, although it will sometimes sit on the high end of *Stoich.*
...anyone have any ideas of what i could do or what it might be?

[BLLDOGG]

ok...since you replaced the sensor and it continued, it probably wasnt the sensor. and the air/fuel gauges are suppose to bob back and fourth, not stay still so yeah, i dont know what to say other than i think you have another problem thats causing your richness

[FunkZ]

Might be a leaky injector or weak spark. Check your plugs on that side to see if one looks blacker than the rest.

[schenk85]

the sensor does "bob," its not a stationary reading, i know there must be another problem.
ill be sure to check the plugs this weekend when i do the oil and some other maintenance...
if anyone has any other suggestions, let me know, everything is helpful, thank you!

[schenk85]

ok, so i'm not sure that any of the plugs show any more wear than another yet, but i am also thinking that my TB might have something to do with it because of the fact that i P&P'd it a while ago, and i noticed it shortly after that. would it have anything to do with the fact that i didnt change anything electronically to compensate?

[98Camaro3.8]

:eek:

Others who have tried to P&P their TBs have run into big problems with the computer not liking what they did. With something like that, I think you really need to have the PCM tuned to avoid problems. There were a couple big threads on that if I remember. Try searching and seeing what comes up regarding a throttle body P&P.

Edit: Here ya go. http://www.camarov6.com/cgi-bin/ulti...=002740#000003
Regarding that thread, when they refer to 98+ I think they actually mean 99+. ;)

[schenk85]

thanks..ya, i knew about the idle problems, i just wasnt sure if that had anything to do with an O2 sensor problem, and in turn problems with my old Cat.?
i have been wanting to find a way to get my PCM tuned, but havent been able to get around to it so far. ill have to go to a local tuning shop to see if theres anything that they can do for me.