idle fluctuating constantly

[LS what]

hi i have a problem with my idle, i tried searching but couldnt find someone with this exact problem. When i am driving and let off the gas the idle will drop really low, sound like its about to die, then rev back up and back down again and so on. Finally after fluctuating for a little bit it returns to normal. It is really bad when i let off the gas and make a sharp turn, it drops really low and sometimes even dies. Has anyone had this problem? thanks for any help

 

[Polter83]

Did you pull the codes?

Try this.. have it at idle... take a can of carb cleaner and spray around the intake and inner valve covers and throttle body. See if the rpms increase. If so, you have a vacuum leak. Cheap test, report back.

 

[jrichker]

Read through the Sticky at the top of the forum " Help me create the urging Idle Checklist" and you will find the answer to your idle problems.