so i purchased my car july 08 and it only has 5500 miles on it. recently ive been having rough idle issues(turn car on on a warm start, car turns on, rpm goes up but on its way back down it drops to about 400 and then comes back up to about 550-600)

shall i just take it to the dealer and have them diagnose/fix problem under warranty?? the car only has 5500 miles on it!!

thanks

 

I'm assuming you don't have any mods like an intake etc...

I would say take it to a dealer. Whatever it is, it should be under warranty.

 

no mods, bone stock.

 

Go straight to your dealer! Get your money's worth! 08 here is 1700 miles going strong! If I have any problems dealership comes first.

 

Take it to the dealer.

 

Dealer then report back.

Good luck.

 

probley just a censore in your intake unscrew it from the tube and clean it... well if the stealership wants to charge you that is.

 

Zs suffer from rough idle's, there not going to be able to fix, dont worry though, it will grow on you after awhile lol

 

Stealership time! BTW, my 'O4 Touring Coupe purrs like a kitten; no rough idle at all, at 19,190k. That can't be "normal". Also, try changing gas stations; it could be moisture in the fuel, etc. I only get Texaco, 'cause of Techron.

 

all that is normal, if i come up to a stop light after a fast run/brake mine does it too. my 05 did the same thing. once again that is normal.

 

My 04.5 does not do it.. maybe not normal in some percentage of cars?

 

I'm in for the dealership reason(s) for the rough idle.

I guess you have already changed the oil for the first time and had the air filter check/changed.

Could be a number of items; MAF sensor fouled, O2 sensors fouled, intake fouled, spark plugs fouled,etc.