Hello, Can anyone help with my IS300's very high cold idle speed?
I have a 2004 IS300 sportcross auto, which has only recently (in the last 2 weeks) started to idle very fast 1250 to 1400 rpm when started up from cold (first thing in the morning or after it has been parked for a couple of hours), until two weeks ago it idled very happily at 650/700 rpm in D when cold or warm.
I looked on the forum and followed the suggestions posted so I have today cleaned the MAF sensor, cleaned the throttle body, checked linkages, the car was serviced in July and the air filter was changed then, but after cleaning everything today the engine is now idling even faster on a cold start and now the idle speed only drops back to between 800rpm and 1000rpm when the engine is warm?
I also noticed that, since cleaning everything, when warm, the idle rpm (with the car stopped and in park) is 800 - 1000rpm with the a/c on but over 1100rpm with the a/c switched off?
Can anybody suggest a cure/remedy for this as has only happened in the last couple of weeks and I am having to constantly hold the car on the brakes when in traffic as it tries to constantly pull forward until the engine is fully warmed up.
Thank you all in advance, any help would be very much appreciated.
Dennis