My car has been has had a rough idle for a while now, I have replaced the O2 upstream sensor & the IAC. checked the plugs, wires didn't see anything out of the ordinary. The car runs fine but idles rough, before I changed out the above parts I had it scoped & they said that O2 sensor was bad so I changed it.
Car was also running lean & had a miss? I can't feel the car missing so I don't know where that comes from. I did have a wire from the fuel pump that was grounding that I had fixed last week.

motor is a 3.8 with 171K miles

thanks in advance for any help

Jim

i had issues with my TPS once - it would just cut off sometimes while driving or idling or just rough idle. it's a pain to replace the TPS though because of it's position... the tps is linked to the throttle pedal.