okay the car was running great and i started it up one day and it idled very sloppy. It idles from 1k down to 300 rpm and wants to die when i take off but under full throttle it will run good. If you try to keep it at a constant speed it will sputter alot it also started to pass some very light colored smoke from tailpipe blackish grey mechanic said it has to be related to the issue. Now things i have done already bought a used idle air control valve same thing didnt fix. Then we cleaned out the egr under the throttle body still no fix already spent over 100 dollars freakin iac valve new cost 328.00 thats why i bought used any ideas please help!!!!! Also if anyone can take a picture of the engine bay so i can see the correct vaccum line configuration i would really appreciate it.