I was gonna say the same exact thing...


~ Joe Z

 

Thanks to those for the kind words!

This would seem to have nothing to do with the transmission fluid level IMO, the engine is not accelerating through the trans the engine at this point in time is doing nothing at all. As mentioned, you can hear the throttle body open on corner exit and the car takes off.

It's raining here at the moment but when I get a chance I will take a video of what's happening.

Really just feels like it's in the programming. Would be easy if this was a GM vehicle as I do efi calibration/dyno tuning on those but I have nothing to use on the ISF of course.

 

^ you should give that a shot anyways if you haven't done ATF recently, several people have said exactly what lobux said about symptoms of low fluid - and i would trust lobux's opinion/ideas over most lexus techs

 

I understand it must **** you off, in the same time it's not normal if the vsc is off, I personally would not own a car that act like this, time to get it to the shop, is it behaving like this since ownership??

 

Yes I agree, it's definitely worth checking and I appreciate the ideas.

All I'm saying as this has happened in manual mode 2nd gear and I can feel the gear is completely engaged with the converter locked.

I just think low trans fluid would be more like I have an rpm increase with no acceleration rather than it's locked in gear with no throttle response.

v8sedan, it has been like this since I bought it but that was only a few months/5k miles ago. Currently has 28k miles. I have a friend who is a Lexus tech (and I used to be way back in 2000 actually) and he didn't expect to find any problems with it.

With electronic throttle vehicles if the requested throttle opening doesn't match actual throttle opening it will set a rationality code. In this case I believe the ecu is getting the proper requested throttle position from the pedal and saying $%&#@ you.

 

I don't want to be rude or anything but, if there is somethimg wrong with your car, a real (good) technician should be able to put the trigger on the problem and fix it, and as all of us are not experiencing that, it is not normal believe me, but you're right about somethin, my car too say %&§#@ you when I floor it, but in another way 👍. Don't loose hope

 

I test drove a 2011 ISF with 40k miles at CarMax last week. That car feel so slow like a second delay in throttle response after I hit the pedal. It won't accelerate fast enough until the engine reach 4000 rpm; Previously, I have test drove locally a 2008, 2012 and 2013 which have way better throttle response. So I think it happen to few cars out there. Should the car need to go to dealer for a check up in engine tune up?

 

Possibly, I will have my friend scan it. Really though, what are most Lexus technicians going to do?

"Customer states occasional lazy/nonexistent throttle response during intentional hard acceleration exiting a corner with vsc/trac disabled"

Would they find any issues or just crash it?

I did notice the car has the smaller gas pedal so it would seem the recall on that was done. (I'm assuming the reflash as well).

Not sure if that would have anything to do with it but I've read a few other people with similar complaints after having the recall completed.

 

Reason for my post #29 on the prior page.

Lou

 

My car has the smaller gas pedal and I've never experienced anything like this. Not while driving aggressively nor at the track. Like others have mentioned, it sounds like something might be wrong.

 

How about trying a reprogram. I work with developers who write software for all different types of chipsets. I load the SW build and run performance testing for them. Many times I would load different types of updates or different SW builds on to chips. And we do see issues all the time when something went wrong during the first initial load...they would initialize properly, but during testing they would crash in certain areas. Our first solution is to reload the SW build, and many times that solves the issues of something corrupted from the first load.

 

This issue happens when the car is on a sustained high G load to a side. Daily driving you don't see this issue. I think this is related to the yaw sensor shutting off the throttle until it detects either the steering wheel being unwound or the G loading is decreased. I have had this very issue over the weekend at Buttonwillow. No throttle at all on corner entry to exit. Throttle is floored but the engine will not react until the car is straightened out. Need to see if I can fool the yaw sensor into thinking the car is not pulling high Gs.

 

I have experienced exactly what you just said, I drove almost every year except a 2010 and 2014. I even posted in the past asking about the throttle lag / response. Maybe, its my bad luck, really bad luck but even on brand new ISF's i felt this is why i probably don't own an F yet..

In manual mode, the car is awesome (nothing wrong) I love it!! .. but driving around in Auto.. trying going 35-45, and kick it.. I've count almost 4 seconds before it kicks down and takes off! I've counted Verbally in the car with the sales guy.. One Mississippi, two mississippi, and three mississippi and four.... then it goes.. somewhere between 3 sec to 3.5 secs it takes to kick down.. I either have the worst luck with F's or their something not right there.. I driven every used F with 40K miles or less.. and a few new ones.. The newer ones have less lag / response but I still feel some sort of lag still (at least 2 secs before a kick down in auto..) its less noticeable in a newest F to me.. But when I get back into my GS430/GS400 and do the same thing, it responds better than brand new ISF..

IMO i think it has something do with the 8 speed tranny and the shift program..

 

It's not the gearbox. Mine only did this when the fluid level was low. It's also possible this is a result of the software flash for the brake override. Mine has never had this update.

 

I think we are on the same page with this ^^^ (though I do experience this on my daily drive).