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Discussion Starter · #1 · (Edited)
i was driving back home after class.
When i stopped for red light, i noticed that needle of rpm gauge moves up and down a little bit.
Plus, engine also revving up and down.
It was kinda big gap between up, and down movement.
i wouldn't worry if it was little gap, but it moves up and down about 400~500 rpm.
Is it normal?
i am just newb, so please anwser me.
Thanks.
 

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i just read the edit.. mine has about 200 rpm differnce sometimes, but for about a week it jumped quite a bit and i didnt do anything about it and now it jumps about 200 rpm sometimes(usually before its warmed all they way up)
 

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Possibly a vacuum leak. Check all hoses and intake manifold gasket.
 
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