Alright guys need some help, my 8 has some work donr, has 272 amoung other goodies, was tuned with speed density running fine and now when I get on it and then come to a stop it won't idle correctly, it will rev high almost 2-3k rpm thn come back down and Then back up like I have a bad iac? Yet reading other posts ppl have spoken about just being iac sensor so I'm confused, basically how can I tell what's bad weather it's a bad iac or just the iac sensor? Thanks in advance for any helpful information

 

Is your throttle body catching at all?

 

Have you checked all your vacuum hoses?

 

All hoses good, only seems to happen when sitting in neutral or with clutch down... Just came across another thread in which they had very similar issues and replaced iac ironically from a Chrysler Sebring , which is same part ( referencing thread by 4retech)... I'm still learning about cars, idk of my throttle body is catching? It drives fine until I come to a stop or also on cold start sits very high at like 3-3200k then drop backdown then up again

 

In addition def notice it after I get on it driving and then coming to a stop

 

i have the same problem..i changed my TPS and IAC in addition to converting my BOV to recirc.but that didn't solve the problem..i was told to change o2 sensor it could be the problem..
so i suggest you should just find a used parts dealer to check which one of those is gone bad???

 

Yea I've already had recir bov, I've just got prices for front o2 sensor and iac thru websites I've found in other threads so when paycheck comes in I'm just ordering all of it