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I think this is an electrical problem, it could be a fuel problem. But its the weirdest thing when i come up to a stop light or stop. The car just jumps between idles rpms, it goes up and down up and down between 500-1500 rpms but eventually it will shut off. but if i hit the gas and rev it up at a stop. it'll go away then after a while come back again. But when im driving it does fine. There's one problem of a little skip in 3rd and 4th gear at about 3500 rpms but i think it may be an unrelated problem. Also would like suggestions on what that could be. And i also tried driving and just put it in neutral and it doesnt do it then? just when im stopped.

Any Help would be appreciated.
Thanks, Grant
 

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Any computer codes? Check engine light may not be on but there can still be codes.
 

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list the mods from stock you have done or have

most idle problems come from some type of air mass modifiction.
 
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