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idle rpm surge.... again

2K views 2 replies 2 participants last post by  SD318is 
#1 ·
had some surging of rpm while at idle on my 93 318is a while back, replaced the idle air control module and it went away. BUT, it seems to be back... you guys think there is some problem causing the IAC to get dirty or do i have some other problem going on all together??

thanks,
corey
 
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