89 running rich, o2 sensors?

[remat457]

My stang is running a little rich could it be the 17 year old o2 sensors? Or might it have something to do with replacement exhaust (headers, h, catback)?

thanks

 

[DeVus1]

Power = Air + Fuel.

Unless you put on a new throttle body or mass air sensor, it may be the O2 sensors. I would get an adjustable fuel pressure regulator first, then replace the O2s.

 

[remat457]

Power = Air + Fuel.

Unless you put on a new throttle body or mass air sensor, it may be the O2 sensors. I would get an adjustable fuel pressure regulator first, then replace the O2s.

Stock TB and MAF. Probably will end up doing both since they are both on the list of things to do (a long list pending funding of course)


thanks for the advice!