sorry 2 bug you guys but i been having a problem with my car for a while. I don't have the CEL on so I don't know what it is. The car drives normal. Dont feel power lost but when I stop, the car idles find but then it shakes a little then idle is normal then it shakes again. it doesnt turn off but it worries me. When i drive off its like nothing happen. I did have a code for my Cats. Code P420. I went 2 the dealer and they clear the code but I dont think thats the problem because it wasnt doing it before. Plz help. Thank u.

 

Clogged injectors? Idle to low? Tell the dealer to do a idle relearn. Do you have aftermarket cats?

 

rotors?? i have the same problem but its not annoying its just a little so i havent bothered to check it out. if you find out lmk lol

 

i do have FI 300 Cell high flow cats. My warranty is done. My idle is normal when I do a full stop but it drops then car shakes little then back 2 normal. can it be 02 sensor? i only had the cats for 18 months

 

may be a bad coil pack

 

clean the throttle body?

 

Bad gas maybe?

 

Have you checked your oil? You could be a little a low.

 

I'm thinking dirty throttle body as well. That's any easy thing to check before you do something more expensive.

 

oil is fine bro. gas is normal. im going 2 try 2 clean the Throttle body

 

^Don't lose the straw in the plenum like that one guy did hahaha

 

If it was an issue with rotors it would only shake/vibrate while coming to a stop, not at idle stopped!
HAHAHA, I think that guy was too embarrassed to ever post on DRIVER again after admitting he lost his straw while cleaning his throttle body. His mistake was asking if it would hurt anything....

To fix the rough idle issue I'd clean the throttle body to begin. If that doesn't fix the issue take it in for service, could be a coil or plugs....kinda hard to tell from here.
Gary

 

ill clean it tom. then ill let u guys know. thanks for ur help guys

 

I had the same thing. Put your window down too, and you can hear it in the exhaust note, right? Its a weird feeling and definitely unsettling wondering if your car is going to shut off at any moment. Does your RPM drop a little bit as well?
I don't remember specifically what I did.. I think I just had a full liquid injector cleaning, then I believe I also had my idle adjusted up a bit. It went away. I'm pretty sure thats all I did. But I could be mistaken.. Good luck bud

 

i have the same problem to dealer told me it was from my intake i wanna go back and get my idle adjusted