Hi there on my 2007 is250 MT tranny. my car alway lagging when i first took off and than when it hit about 2500rpm it will pick up as if it is driving normally. what can it be to make the car do that. any input are really grateful. so far what i did are clean throttle body and spray throttle body cleaner into the throttle body while the car is running and it stop the lag for awhile and it came back.

 

Have you done tune up, spark plug change, clean fair filter? Maybe time to trade it in for IS350

 

I would also try Seafoam fuel injector cleaner. IS250 direct fuel injector have carbon buildup issue, and effect engine performance.

 

Is this something that just started happening, or has it always been like this? Is it like that in every gear or just from a stop?

Are there any misfire engine codes or similar? You may have carbon build-up issues. How many miles are on the car?

Jeff

 

i just bought the car like last year dec. and it only happen from a stop on first gear only.. i change out all my spark plug. air filter look clean but the one that under the stock pip look kinda dirty dont know how to take that one out and dont wanna try to take it out without knowing how cuzz i might mess it up. never really look into the seafoam yet but how do i use it.. i would like to get the is350 but than it dont come in stick shift lol..

 

How many miles are on the car?

It's been doing it since you got the car last December?

Jeff

 

Poor Seafoam fuel injector in gas tank when fill up.
IS350 = 306 Hp.

 

Yes it been doing it since I got the car and now it at 90k.. 350 = no stick shift.. I want stick shift lol

 

I would check for codes, if you've got misfiring codes, I would start looking into getting something done about carbon buildup. If you've got other codes, maybe they might give some insight into what's causing the concern(s).

Jeff

 

there is no code.. use the ob2 reader and nothing come up..

 

well anyway i test all my gear and it look like it do that in all gear.. as long as it under 2500 rpm it will lag till it hit 2500rpm than it will pick up like normal..