Engine idle issues

[sleezevil]

Hi. Long time lurker. I have a 93 ATX Sho. My car recently started throwing codes accompanied by a rough idle and laggy acceleration. The codes I've pulled are 172 - Lack of heated O2 sensor switch running lean, 173 - lack of heated O2 sensor switch running rich, and 179- fuel system at lean adaptive limit at partial throttle, system rich. I also had a 332, but fixed that thanks to some posts here. Does anyone have any opinions? I don't want to jump to the O2 sensors for replacement immediately, but would like to know if anyone has encountered the same issues before? Thanks!

 

[Slo-Sho]

Sounds like a dead 02 sensor. Replace with NTK brand (OEM part), it's currently just under $28 from Rockauto.

 

[sleezevil]

I'll try that out. I was thinking about unplugging my sensors and seeing if the motor runs stable without before replacing.

 

[sleezevil]

Sounds like a dead 02 sensor. Replace with NTK brand (OEM part), it's currently just under $28 from Rockauto.

The NTK ones part #22500 correct?

 

[sleezevil]

Ran the SHO with the O2 sensors unplugged. Idle issue magically disappeared. Will be ordering new ones tonight.

 

[SHOdded]

The NTK ones part #22500 correct?

Correct.

 

[sleezevil]

Sorry, I forgot to update! O2 sensors were dysfunctional, replaced. Problem resolved.