amw896

Hi All,

I just picked up a 2011 IS 350 and have a question about proper idle speed. To me it seems a bit low when sitting in drive, usually hovers around 600-650 with little to no vibration. When I put it in neutral it sits at 700-750 and the vibration is gone.

I'm coming from a 250 where I had a constant 750 at all times so it's throwing me off.....

Thanks!

Gville350

iTrader: (10)

Sounds normal to me. Since owning the car, have you had to disconnect the battery for any reason? Doing this will force the vehicle's system to re-learn everything, including your driving style/habits.

amw896

Haven't disconnected anything yet but thanks man! How are you running 8.69?!!!!

idoke1

iTrader: (5)

It is normal. Its the ecu leaning out the fuel and causing the car to shake. The 350 has 12 injectors compare to the 250 having only 6 injectors.

amw896

12? That's news to me as well.....is this why the 250's are so prone to the carbon build up?

FSportIS

iTrader: (13)

My IS350 is like that too. I also notice IS350 shakes a little bit more than IS250 in idle. I figure probably because my IS250 is 6 years younger lol.

idoke1

iTrader: (5)

^^yup. The is350 has 6 fuel injectors and 6 more direct injectors. The is250 has only 6 direct injectors. Having only direct injectors, the is250 is prone to carbon build up.

Gville350

iTrader: (10)

Had a good night that day!

https://www.clublexus.com/forums/per...-81-81mph.html