I have 07 justa hits 64k automatic transmission and when i run on the street and fully stopped the car, rpm goes down to 500 and slowly going up to normal which is 700. I feel like when coming to a full stop the RPM would go really low and then jump back up making the car surge forward. last time, when i post about this situation, other guy told me to reconnect the MAF sensor and tighten hoses but didn't work at all.. anybody knows how to fix it?

 

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help !!

 

Disconnect the battery for a couple of hours and reset the ECU. Unless it is causing a serious danger don't worry about it. Also you can take it to a mechanic and ask.

 

this is what i'm suffering... but i'm little bit less than that..
http://www.youtube.com/watch?v=Gz61IuHsgM8
and difference between the guy on video and me is he got type-s and mine is justa..

 

Not sure if it's exactly what you're experiencing but there have been other Justas autos that have experienced the same RPM drop when coming to a stop. I'm one of them and I know someone else had it so bad that the car would stop.

 

Have you ever changed your spark plugs? Possiblilty.
Also, is the air cleaner clean?

 

spark plug not yet, you mean cabin air filter is clean? not bad.

 

Not cabin air filter, the engine air filter. Dirty plugs or dirty engine air filter can cause idle shift.
These are just the two first things I'd check or replace and see if that helps your idle issue.

 

actually justas replace spark plugs on 100k, doesn't it?

 

That may be there recommendation but they can get dirty or fail prior to the recommended change interval.
It's just like Mini's recommendation that oil changes be every 15K miles. Now they've changed that to 10K miles because of all the issues occuring from too long of oil change intervals (essentually for the S model though).
Pull a plug out and check it. If it's not toast, you're ok. If really blackened, I'd replace.