Hesitation problem at various speeds (TSB info post #159)
04-03-18, 07:30 PM
#766
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04-03-18, 07:51 PM
#767
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I apologize for the delayed response I was searching for the print out from the last visit at the dealership since the fix. I look at the work order (I stressed this acceleration/transition hesitation issue to the rep who was taking care of me and she did notify the mechanics about it), but there was nothing on the physical print out that lists the fix for it as I do believe what another member mentioned before in this thread that it would be a discreet fix once you bring your vehicle into the dealership (which makes me curious if it was an ECU transmission setting to make the MPG numbers look good, but don't quote me on that as I'm just speculating). To update from my last post, the hesitation transmission issue is still gone/fixed and it's still a pleasure to drive (and I'm still putting in regular 87 gas the entire time).
I'm trying to track my MPG to see if it has been affected, but I do mostly 70% city/30% highway and the highest was 24 MPG but average around 17-18 MPG which does seem a bit low...
I'm trying to track my MPG to see if it has been affected, but I do mostly 70% city/30% highway and the highest was 24 MPG but average around 17-18 MPG which does seem a bit low...
04-04-18, 06:50 AM
#768
Racer
yes,mine shifts down and rpm goes almost to red line and also if i go down the hill it acts the same, shifts couple gears down and rpm goes up like crazy, engine noise sounds like formula one race...Do you have hesitation issue driving city at normal speeds specially after you make a turn and need to accelerate? What year is your RX?
04-05-18, 10:13 AM
#769
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exactly same, hesitation after turning, i wrote a letter to lexus and set the appt this saturaday for me at my dealership
04-05-18, 11:31 AM
#770
Racer
Have you tried putting it in "Sport" and see what happens? The hesitation to downshift in "Normal or Eco" is probably the way it was designed to work. But if I put it in "Sport", it downshifts immediately.
04-05-18, 12:42 PM
#771
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04-05-18, 01:55 PM
#772
Racer
Yes, my engine speed is slightly higher, but certainly not objectionable. Perhaps your car does have a problem. Hopefully they'll fix it.
04-05-18, 06:09 PM
#773
I've found that when driving around my home town (rural area, a slow way of life) the changes are good as I'm just feathering the throttle out of corners/roundabouts, just let it accelerate slower than some people may like. When I regularly go to the city (Sydney) where traffic is a faster pace I try to give some more throttle for the corners/roundabouts and yes the car has changed up gears so than downchanges abruptly - this is where the Sport mode is better. I'm sure they have designed it to get better fuel consumption in Normal and like I said if it's driven in a more sedate manner it's fine. It's only a minor complaint for me as there's so many positives with the car I can overlook this issue.
04-06-18, 08:39 AM
#774
Intermediate
I've found that when driving around my home town (rural area, a slow way of life) the changes are good as I'm just feathering the throttle out of corners/roundabouts, just let it accelerate slower than some people may like. When I regularly go to the city (Sydney) where traffic is a faster pace I try to give some more throttle for the corners/roundabouts and yes the car has changed up gears so than downchanges abruptly - this is where the Sport mode is better. I'm sure they have designed it to get better fuel consumption in Normal and like I said if it's driven in a more sedate manner it's fine. It's only a minor complaint for me as there's so many positives with the car I can overlook this issue.
04-06-18, 07:10 PM
#775
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btw guys, do you feel any difference between NORMAL and ECO?? I do not feel anything at all. Car is great on the highway, but city driving ( Chicago) is killing me. From start to stop it is not bad unless i make a turn in low speed and press a pedal
04-09-18, 06:51 AM
#776
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left my rx at the dealer on saturday, they gave me a loaner, oh men, this rx is like a jet, no hesitation at all, Eco mode is almost as my Sport mode, downshifts instantly after turning. My rx is made in Japan and this loaner is made in Canada.
04-09-18, 02:53 PM
#777
Racer
05-02-18, 02:28 PM
#779
Intermediate
05-02-18, 02:51 PM
#780
Driver School Candidate
hesitation
there are many posts about hesitation, 16 up rx350, I owned a shop for 37 years. Here is the deal,Lexus, in its quest to satisfy EPA Regs has mapped the Ecu to pass the tests. In doing this the Ecu is not providing enough ignition advance to operate smoothly. Without correct advance, hesitation on tip in occurs, trans shif points are affected, and fuel mileage will suffer. As I was told by my dealer, Lexus does not have a fix, there is a very simple solution. Install a powertune module in the obd port under the dash. 80$. All it does is raise the timing, improve shift points, and improve fuel mileage around 2 mpg. Forget the ECO mode, it’s a joke and you don’t need it. Cruising at 75 mph I get better mileage in sport. I am now seeing27-28 mpg on the highway. All the benefits are the result of more ignition advance. Nothing else. Better fuel is a good idea. Shell mid-grade is just fine. DO NOT buy cheap gas.