I changed my I.A.C Valve and my car still Idles like crap.. It keeps bouncing. Any ides out there of what could be wrong? It only Idles bad when in park and nuetral. Just wasted 60$ on that valve and I can't return it.

Thanx for any help.

 

Have you replaced anything else such as the O2 sensor?
Have you checked for vacuum leaks?

 

Started to check for leaks today. I dissconnected my o2 sensor and my car's idle just dropped to like 4,000 and stayed there. I really wanna get to the bottom of this thing. I just bought the car like 2 weeks ago. Ah gotta spend more money that I aint got...But it'll be worth it in the end.